Search (29 results, page 1 of 2)

  • × year_i:[1920 TO 1930}
  1. Bock, F.: Zur Geschichte des Schlagwortkatalogs in Praxis und Theorie (1923) 0.09
    0.08681609 = product of:
      0.26044825 = sum of:
        0.04033241 = weight(_text_:und in 2375) [ClassicSimilarity], result of:
          0.04033241 = score(doc=2375,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.39180204 = fieldWeight in 2375, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.125 = fieldNorm(doc=2375)
        0.22011584 = weight(_text_:theorie in 2375) [ClassicSimilarity], result of:
          0.22011584 = score(doc=2375,freq=2.0), product of:
            0.24048392 = queryWeight, product of:
              5.17774 = idf(docFreq=677, maxDocs=44218)
              0.04644573 = queryNorm
            0.91530377 = fieldWeight in 2375, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.17774 = idf(docFreq=677, maxDocs=44218)
              0.125 = fieldNorm(doc=2375)
      0.33333334 = coord(2/6)
    
  2. Diesch, K.: Katalogprobleme und Dezimalklassifikation : eine bibliothekswissenschaftliche Untersuchung und Abwehr (1929) 0.04
    0.040836167 = product of:
      0.122508496 = sum of:
        0.071298294 = weight(_text_:und in 1933) [ClassicSimilarity], result of:
          0.071298294 = score(doc=1933,freq=4.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.6926147 = fieldWeight in 1933, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.15625 = fieldNorm(doc=1933)
        0.051210202 = weight(_text_:der in 1933) [ClassicSimilarity], result of:
          0.051210202 = score(doc=1933,freq=2.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.4935974 = fieldWeight in 1933, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.15625 = fieldNorm(doc=1933)
      0.33333334 = coord(2/6)
    
    Theme
    Geschichte der Klassifikationssysteme
  3. Schultze, W.: ¬Die Zukunft unserer Realkataloge (1928) 0.03
    0.033534776 = product of:
      0.100604326 = sum of:
        0.04990881 = weight(_text_:und in 7389) [ClassicSimilarity], result of:
          0.04990881 = score(doc=7389,freq=4.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.4848303 = fieldWeight in 7389, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.109375 = fieldNorm(doc=7389)
        0.050695516 = weight(_text_:der in 7389) [ClassicSimilarity], result of:
          0.050695516 = score(doc=7389,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.4886365 = fieldWeight in 7389, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.109375 = fieldNorm(doc=7389)
      0.33333334 = coord(2/6)
    
    Imprint
    Berlin : Verl. von Struppe und Winckler
    Source
    Von Büchern und Bibliotheken. [Festschrift] Ernst Kuhnert. Hrsg.: Gustav Abb
    Theme
    Geschichte der Sacherschließung
    Geschichte der Kataloge
  4. Ostwald, W.: ¬Die Pyramide der Wissenschaften : eine Einführung in wissenschaftliches Denken und Arbeiten (1929) 0.03
    0.032756716 = product of:
      0.09827014 = sum of:
        0.04033241 = weight(_text_:und in 3505) [ClassicSimilarity], result of:
          0.04033241 = score(doc=3505,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.39180204 = fieldWeight in 3505, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.125 = fieldNorm(doc=3505)
        0.05793773 = weight(_text_:der in 3505) [ClassicSimilarity], result of:
          0.05793773 = score(doc=3505,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.5584417 = fieldWeight in 3505, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=3505)
      0.33333334 = coord(2/6)
    
    Series
    Wege der Technik
  5. Meyer, A.: Systematischer und Schlagwortkatalog : Probleme des Realkatalogs, 3 (1923) 0.03
    0.032756716 = product of:
      0.09827014 = sum of:
        0.04033241 = weight(_text_:und in 7384) [ClassicSimilarity], result of:
          0.04033241 = score(doc=7384,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.39180204 = fieldWeight in 7384, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.125 = fieldNorm(doc=7384)
        0.05793773 = weight(_text_:der in 7384) [ClassicSimilarity], result of:
          0.05793773 = score(doc=7384,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.5584417 = fieldWeight in 7384, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=7384)
      0.33333334 = coord(2/6)
    
    Theme
    Geschichte der Sacherschließung
    Geschichte der Kataloge
  6. Schunke, I.: ¬Die systematischen Ordnungen und ihre Entwicklungen : Versuch einer geschichtlichen Übersicht (1927) 0.03
    0.03194888 = product of:
      0.09584664 = sum of:
        0.052393336 = weight(_text_:und in 1509) [ClassicSimilarity], result of:
          0.052393336 = score(doc=1509,freq=6.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.5089658 = fieldWeight in 1509, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.09375 = fieldNorm(doc=1509)
        0.0434533 = weight(_text_:der in 1509) [ClassicSimilarity], result of:
          0.0434533 = score(doc=1509,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.4188313 = fieldWeight in 1509, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.09375 = fieldNorm(doc=1509)
      0.33333334 = coord(2/6)
    
    Footnote
    Die in diesem Beitrag entwickelte Unterteilung von Klassifikationssystemen in 'wissenschaftliche', 'philosophisch-enzyklopädische' und 'bibliothekarische' ist später immer wieder aufgegriffen und im Sinne einer Typologie verwendet worden
    Theme
    Geschichte der Klassifikationssysteme
    Geschichte der Sacherschließung
  7. Fuchs, H.: ¬Der Gesamtkatalog der preußischen Bibliotheken und sein Ausbau zu einem deutschen Gesamtkatalog (1928) 0.03
    0.028744092 = product of:
      0.086232275 = sum of:
        0.04277898 = weight(_text_:und in 4094) [ClassicSimilarity], result of:
          0.04277898 = score(doc=4094,freq=4.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.41556883 = fieldWeight in 4094, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.09375 = fieldNorm(doc=4094)
        0.0434533 = weight(_text_:der in 4094) [ClassicSimilarity], result of:
          0.0434533 = score(doc=4094,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.4188313 = fieldWeight in 4094, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.09375 = fieldNorm(doc=4094)
      0.33333334 = coord(2/6)
    
    Source
    Von Büchern und Bibliotheken: dem ersten Direktor ... Ernst Kuhnert als Abschiedsgabe dargebracht ... Hrsg.: Gustav Abb
  8. Meyer, A.: Zeitlich begrenzte Realkataloge (1922) 0.03
    0.027487502 = product of:
      0.082462505 = sum of:
        0.025207756 = weight(_text_:und in 7385) [ClassicSimilarity], result of:
          0.025207756 = score(doc=7385,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.24487628 = fieldWeight in 7385, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.078125 = fieldNorm(doc=7385)
        0.057254747 = weight(_text_:der in 7385) [ClassicSimilarity], result of:
          0.057254747 = score(doc=7385,freq=10.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.55185866 = fieldWeight in 7385, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.078125 = fieldNorm(doc=7385)
      0.33333334 = coord(2/6)
    
    Content
    "So viele Epochen der Wissenschaftsgeschichte und dementsprechend so viel verschiedene Systeme der [Einzel-] wissenschaften im Bewußtsein der Zeiten, so viele getrennte Realkataloge" (S.390)
    Theme
    Geschichte der Sacherschließung
    Geschichte der Kataloge
  9. Fick, R.: ¬Die Kataloge der Druckschriftenabteilung (1921) 0.03
    0.02710019 = product of:
      0.08130057 = sum of:
        0.04033241 = weight(_text_:und in 6790) [ClassicSimilarity], result of:
          0.04033241 = score(doc=6790,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.39180204 = fieldWeight in 6790, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.125 = fieldNorm(doc=6790)
        0.04096816 = weight(_text_:der in 6790) [ClassicSimilarity], result of:
          0.04096816 = score(doc=6790,freq=2.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.3948779 = fieldWeight in 6790, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=6790)
      0.33333334 = coord(2/6)
    
    Source
    Fünfzehn Jahre Königliche und Staatsbibliothek, Adolf von Harnack überreicht
  10. Tillich, P.: ¬Das System der Wissenschaften nach Gegenständen und Methoden : ein Entwurf (1923) 0.03
    0.02710019 = product of:
      0.08130057 = sum of:
        0.04033241 = weight(_text_:und in 8545) [ClassicSimilarity], result of:
          0.04033241 = score(doc=8545,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.39180204 = fieldWeight in 8545, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.125 = fieldNorm(doc=8545)
        0.04096816 = weight(_text_:der in 8545) [ClassicSimilarity], result of:
          0.04096816 = score(doc=8545,freq=2.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.3948779 = fieldWeight in 8545, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=8545)
      0.33333334 = coord(2/6)
    
  11. Schleimer, H.: ¬Der bibliothekarische Schlagwortkatalog : Mit Regeln für die Universitätsbibliothek Graz und einem Anhang: Systematischer oder alphabetischer Sachkatalog? (1923) 0.02
    0.023712665 = product of:
      0.071137995 = sum of:
        0.035290856 = weight(_text_:und in 617) [ClassicSimilarity], result of:
          0.035290856 = score(doc=617,freq=2.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.34282678 = fieldWeight in 617, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.109375 = fieldNorm(doc=617)
        0.035847142 = weight(_text_:der in 617) [ClassicSimilarity], result of:
          0.035847142 = score(doc=617,freq=2.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.34551817 = fieldWeight in 617, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.109375 = fieldNorm(doc=617)
      0.33333334 = coord(2/6)
    
  12. Jesinger, A.: Kataloge und Aufstellung der Wiener Universitätsbibliothek in ihrer geschichtlichen Entwicklung (1926) 0.02
    0.02133293 = product of:
      0.06399879 = sum of:
        0.02851932 = weight(_text_:und in 2426) [ClassicSimilarity], result of:
          0.02851932 = score(doc=2426,freq=4.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.27704588 = fieldWeight in 2426, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.0625 = fieldNorm(doc=2426)
        0.03547947 = weight(_text_:der in 2426) [ClassicSimilarity], result of:
          0.03547947 = score(doc=2426,freq=6.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.34197432 = fieldWeight in 2426, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.0625 = fieldNorm(doc=2426)
      0.33333334 = coord(2/6)
    
    Footnote
    Hergestellt in 750 Stücken, wovon 500 für die Teilnehmer des Bibliothekartages in der Presse numeriert wurden.
    Series
    H.-Berthold-Messinglinienfabrik und Schriftgiesserei: Bertholddruck ; 17
    Theme
    Geschichte der Kataloge
  13. Meyer, A.: ¬Der Realkatalog (1923) 0.01
    0.012070361 = product of:
      0.07242216 = sum of:
        0.07242216 = weight(_text_:der in 100) [ClassicSimilarity], result of:
          0.07242216 = score(doc=100,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.6980521 = fieldWeight in 100, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.15625 = fieldNorm(doc=100)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Kataloge
  14. Eppelsheimer, H.W.: ¬Der neue Sachkatalog der Stadtbibliothek Mainz (1929) 0.01
    0.011826491 = product of:
      0.07095894 = sum of:
        0.07095894 = weight(_text_:der in 5999) [ClassicSimilarity], result of:
          0.07095894 = score(doc=5999,freq=6.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.68394864 = fieldWeight in 5999, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=5999)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Kataloge
  15. Meyer, A.: Probleme des Realkatalogs (1921) 0.01
    0.009656289 = product of:
      0.05793773 = sum of:
        0.05793773 = weight(_text_:der in 1669) [ClassicSimilarity], result of:
          0.05793773 = score(doc=1669,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.5584417 = fieldWeight in 1669, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=1669)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Sacherschließung
    Geschichte der Kataloge
  16. Räuber, ? von: Erwägungen zu Adolf Meyer: "Zeitlich begrenzte Realkataloge" (1923) 0.01
    0.009656289 = product of:
      0.05793773 = sum of:
        0.05793773 = weight(_text_:der in 1836) [ClassicSimilarity], result of:
          0.05793773 = score(doc=1836,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.5584417 = fieldWeight in 1836, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=1836)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Sacherschließung
    Geschichte der Kataloge
  17. Boysen, K.: Systematischer oder Schlagwortkatalog (1921) 0.01
    0.009656289 = product of:
      0.05793773 = sum of:
        0.05793773 = weight(_text_:der in 1859) [ClassicSimilarity], result of:
          0.05793773 = score(doc=1859,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.5584417 = fieldWeight in 1859, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=1859)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Sacherschließung
    Geschichte der Kataloge
  18. Luther, A.: ¬Der Sachkatalog (1925) 0.01
    0.009656289 = product of:
      0.05793773 = sum of:
        0.05793773 = weight(_text_:der in 1252) [ClassicSimilarity], result of:
          0.05793773 = score(doc=1252,freq=4.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.5584417 = fieldWeight in 1252, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=1252)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Kataloge
  19. Eichler, F.: Wert und Verhältnis des systematischen und des Schlagwortkatalogs (1924) 0.01
    0.00950644 = product of:
      0.05703864 = sum of:
        0.05703864 = weight(_text_:und in 609) [ClassicSimilarity], result of:
          0.05703864 = score(doc=609,freq=4.0), product of:
            0.10294078 = queryWeight, product of:
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.04644573 = queryNorm
            0.55409175 = fieldWeight in 609, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.216367 = idf(docFreq=13101, maxDocs=44218)
              0.125 = fieldNorm(doc=609)
      0.16666667 = coord(1/6)
    
  20. Wieser, M.: Wissenschaftliches Grundschema für Volksbüchereien (1926) 0.01
    0.008535034 = product of:
      0.051210202 = sum of:
        0.051210202 = weight(_text_:der in 1296) [ClassicSimilarity], result of:
          0.051210202 = score(doc=1296,freq=2.0), product of:
            0.10374893 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.04644573 = queryNorm
            0.4935974 = fieldWeight in 1296, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.15625 = fieldNorm(doc=1296)
      0.16666667 = coord(1/6)
    
    Theme
    Geschichte der Klassifikationssysteme