Search (119 results, page 1 of 6)

  • × theme_ss:"Semantic Web"
  • × year_i:[2010 TO 2020}
  1. Papadakis, I. et al.: Highlighting timely information in libraries through social and semantic Web technologies (2016) 0.03 
    0.02833048 = product of:
  0.05666096 = sum of:
    0.05666096 = sum of:
      0.01090265 = weight(_text_:e in 2090) [ClassicSimilarity], result of:
        0.01090265 = score(doc=2090,freq=4.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.22458905 = fieldWeight in 2090, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.078125 = fieldNorm(doc=2090)
      0.04575831 = weight(_text_:22 in 2090) [ClassicSimilarity], result of:
        0.04575831 = score(doc=2090,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.38690117 = fieldWeight in 2090, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.078125 = fieldNorm(doc=2090)
  0.5 = coord(1/2)
    Language
    e
    Source
    Metadata and semantics research: 10th International Conference, MTSR 2016, Göttingen, Germany, November 22-25, 2016, Proceedings. Eds.: E. Garoufallou
  2. Metadata and semantics research : 10th International Conference, MTSR 2016, Göttingen, Germany, November 22-25, 2016, Proceedings (2016) 0.02 
    0.019831337 = product of:
  0.039662674 = sum of:
    0.039662674 = sum of:
      0.007631855 = weight(_text_:e in 3283) [ClassicSimilarity], result of:
        0.007631855 = score(doc=3283,freq=4.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.15721233 = fieldWeight in 3283, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.0546875 = fieldNorm(doc=3283)
      0.032030817 = weight(_text_:22 in 3283) [ClassicSimilarity], result of:
        0.032030817 = score(doc=3283,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.2708308 = fieldWeight in 3283, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0546875 = fieldNorm(doc=3283)
  0.5 = coord(1/2)
    Editor
    Garoufallou, E. et al.
    Language
    e
  3. Prud'hommeaux, E.; Gayo, E.: RDF ventures to boldly meet your most pedestrian needs (2015) 0.02 
    0.017733382 = product of:
  0.035466764 = sum of:
    0.035466764 = sum of:
      0.00801178 = weight(_text_:e in 2024) [ClassicSimilarity], result of:
        0.00801178 = score(doc=2024,freq=6.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.16503859 = fieldWeight in 2024, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.046875 = fieldNorm(doc=2024)
      0.027454983 = weight(_text_:22 in 2024) [ClassicSimilarity], result of:
        0.027454983 = score(doc=2024,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.23214069 = fieldWeight in 2024, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046875 = fieldNorm(doc=2024)
  0.5 = coord(1/2)
    Language
    e
    Source
    Bulletin of the Association for Information Science and Technology. 41(2015) no.4, S.18-22
  4. Hooland, S. van; Verborgh, R.; Wilde, M. De; Hercher, J.; Mannens, E.; Wa, R.Van de: Evaluating the success of vocabulary reconciliation for cultural heritage collections (2013) 0.02 
    0.016998287 = product of:
  0.033996575 = sum of:
    0.033996575 = sum of:
      0.00654159 = weight(_text_:e in 662) [ClassicSimilarity], result of:
        0.00654159 = score(doc=662,freq=4.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.13475344 = fieldWeight in 662, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.046875 = fieldNorm(doc=662)
      0.027454983 = weight(_text_:22 in 662) [ClassicSimilarity], result of:
        0.027454983 = score(doc=662,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.23214069 = fieldWeight in 662, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046875 = fieldNorm(doc=662)
  0.5 = coord(1/2)
    Date
    22. 3.2013 19:29:20
    Language
    e
  5. Hollink, L.; Assem, M. van: Estimating the relevance of search results in the Culture-Web : a study of semantic distance measures (2010) 0.02 
    0.016040293 = product of:
  0.032080587 = sum of:
    0.032080587 = sum of:
      0.0046256026 = weight(_text_:e in 4649) [ClassicSimilarity], result of:
        0.0046256026 = score(doc=4649,freq=2.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.09528506 = fieldWeight in 4649, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.046875 = fieldNorm(doc=4649)
      0.027454983 = weight(_text_:22 in 4649) [ClassicSimilarity], result of:
        0.027454983 = score(doc=4649,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.23214069 = fieldWeight in 4649, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046875 = fieldNorm(doc=4649)
  0.5 = coord(1/2)
    Date
    26.12.2011 13:40:22
    Language
    e
  6. Keyser, P. de: Indexing : from thesauri to the Semantic Web (2012) 0.02 
    0.016040293 = product of:
  0.032080587 = sum of:
    0.032080587 = sum of:
      0.0046256026 = weight(_text_:e in 3197) [ClassicSimilarity], result of:
        0.0046256026 = score(doc=3197,freq=2.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.09528506 = fieldWeight in 3197, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.046875 = fieldNorm(doc=3197)
      0.027454983 = weight(_text_:22 in 3197) [ClassicSimilarity], result of:
        0.027454983 = score(doc=3197,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.23214069 = fieldWeight in 3197, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046875 = fieldNorm(doc=3197)
  0.5 = coord(1/2)
    Date
    24. 8.2016 14:03:22
    Language
    e
  7. Monireh, E.; Sarker, M.K.; Bianchi, F.; Hitzler, P.; Doran, D.; Xie, N.: Reasoning over RDF knowledge bases using deep learning (2018) 0.01 
    0.01416524 = product of:
  0.02833048 = sum of:
    0.02833048 = sum of:
      0.005451325 = weight(_text_:e in 4553) [ClassicSimilarity], result of:
        0.005451325 = score(doc=4553,freq=4.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.112294525 = fieldWeight in 4553, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.0390625 = fieldNorm(doc=4553)
      0.022879155 = weight(_text_:22 in 4553) [ClassicSimilarity], result of:
        0.022879155 = score(doc=4553,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.19345059 = fieldWeight in 4553, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0390625 = fieldNorm(doc=4553)
  0.5 = coord(1/2)
    Date
    16.11.2018 14:22:01
    Language
    e
  8. Metadata and semantics research : 7th Research Conference, MTSR 2013 Thessaloniki, Greece, November 19-22, 2013. Proceedings (2013) 0.01 
    0.013232568 = product of:
  0.026465137 = sum of:
    0.026465137 = sum of:
      0.0038159275 = weight(_text_:e in 1155) [ClassicSimilarity], result of:
        0.0038159275 = score(doc=1155,freq=4.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.078606166 = fieldWeight in 1155, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.02734375 = fieldNorm(doc=1155)
      0.022649208 = weight(_text_:22 in 1155) [ClassicSimilarity], result of:
        0.022649208 = score(doc=1155,freq=4.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.19150631 = fieldWeight in 1155, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.02734375 = fieldNorm(doc=1155)
  0.5 = coord(1/2)
    Date
    17.12.2013 12:51:22
    Editor
    Garoufallou, E.
    Language
    e
  9. Brunetti, J.M.; Roberto García, R.: User-centered design and evaluation of overview components for semantic data exploration (2014) 0.01 
    0.01069353 = product of:
  0.02138706 = sum of:
    0.02138706 = sum of:
      0.003083735 = weight(_text_:e in 1626) [ClassicSimilarity], result of:
        0.003083735 = score(doc=1626,freq=2.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.063523374 = fieldWeight in 1626, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03125 = fieldNorm(doc=1626)
      0.018303324 = weight(_text_:22 in 1626) [ClassicSimilarity], result of:
        0.018303324 = score(doc=1626,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.15476047 = fieldWeight in 1626, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03125 = fieldNorm(doc=1626)
  0.5 = coord(1/2)
    Date
    20. 1.2015 18:30:22
    Language
    e
  10. Zhitomirsky-Geffet, M.; Bar-Ilan, J.: Towards maximal unification of semantically diverse ontologies for controversial domains (2014) 0.01 
    0.01069353 = product of:
  0.02138706 = sum of:
    0.02138706 = sum of:
      0.003083735 = weight(_text_:e in 1634) [ClassicSimilarity], result of:
        0.003083735 = score(doc=1634,freq=2.0), product of:
          0.048544887 = queryWeight, product of:
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03377341 = queryNorm
          0.063523374 = fieldWeight in 1634, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.43737 = idf(docFreq=28552, maxDocs=44218)
            0.03125 = fieldNorm(doc=1634)
      0.018303324 = weight(_text_:22 in 1634) [ClassicSimilarity], result of:
        0.018303324 = score(doc=1634,freq=2.0), product of:
          0.11826873 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03377341 = queryNorm
          0.15476047 = fieldWeight in 1634, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03125 = fieldNorm(doc=1634)
  0.5 = coord(1/2)
    Date
    20. 1.2015 18:30:22
    Language
    e
  11. Eckert, K.: SKOS: eine Sprache für die Übertragung von Thesauri ins Semantic Web (2011) 0.01 
    0.009151662 = product of:
  0.018303324 = sum of:
    0.018303324 = product of:
      0.036606647 = sum of:
        0.036606647 = weight(_text_:22 in 4331) [ClassicSimilarity], result of:
          0.036606647 = score(doc=4331,freq=2.0), product of:
            0.11826873 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03377341 = queryNorm
            0.30952093 = fieldWeight in 4331, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=4331)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    15. 3.2011 19:21:22
  12. Firnkes, M.: Schöne neue Welt : der Content der Zukunft wird von Algorithmen bestimmt (2015) 0.01 
    0.006863746 = product of:
  0.013727492 = sum of:
    0.013727492 = product of:
      0.027454983 = sum of:
        0.027454983 = weight(_text_:22 in 2118) [ClassicSimilarity], result of:
          0.027454983 = score(doc=2118,freq=2.0), product of:
            0.11826873 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03377341 = queryNorm
            0.23214069 = fieldWeight in 2118, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=2118)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    5. 7.2015 22:02:31
  13. Coyle, K.: Understanding the Semantic Web : bibliographic data and metadata (2010) 0.00 
    0.0023128013 = product of:
  0.0046256026 = sum of:
    0.0046256026 = product of:
      0.009251205 = sum of:
        0.009251205 = weight(_text_:e in 4169) [ClassicSimilarity], result of:
          0.009251205 = score(doc=4169,freq=2.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.19057012 = fieldWeight in 4169, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.09375 = fieldNorm(doc=4169)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  14. Hitzler, P.; Janowicz, K.: Ontologies in a data driven world : finding the middle ground (2013) 0.00 
    0.0023128013 = product of:
  0.0046256026 = sum of:
    0.0046256026 = product of:
      0.009251205 = sum of:
        0.009251205 = weight(_text_:e in 803) [ClassicSimilarity], result of:
          0.009251205 = score(doc=803,freq=2.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.19057012 = fieldWeight in 803, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.09375 = fieldNorm(doc=803)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  15. Di Maio, P.: Linked data beyond libraries : towards universal interfaces and knowledge unification (2015) 0.00 
    0.0023128013 = product of:
  0.0046256026 = sum of:
    0.0046256026 = product of:
      0.009251205 = sum of:
        0.009251205 = weight(_text_:e in 2553) [ClassicSimilarity], result of:
          0.009251205 = score(doc=2553,freq=2.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.19057012 = fieldWeight in 2553, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.09375 = fieldNorm(doc=2553)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  16. Rajabi, E.; Sanchez-Alonso, S.; Sicilia, M.-A.: Analyzing broken links on the web of data : An experiment with DBpedia (2014) 0.00 
    0.0019079638 = product of:
  0.0038159275 = sum of:
    0.0038159275 = product of:
      0.007631855 = sum of:
        0.007631855 = weight(_text_:e in 1330) [ClassicSimilarity], result of:
          0.007631855 = score(doc=1330,freq=4.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.15721233 = fieldWeight in 1330, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1330)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  17. Leskinen, P.; Hyvönen, E.: Extracting genealogical networks of linked data from biographical texts (2019) 0.00 
    0.0019079638 = product of:
  0.0038159275 = sum of:
    0.0038159275 = product of:
      0.007631855 = sum of:
        0.007631855 = weight(_text_:e in 5798) [ClassicSimilarity], result of:
          0.007631855 = score(doc=5798,freq=4.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.15721233 = fieldWeight in 5798, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5798)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  18. Lassalle, E.; Lassalle, E.: Semantic models in information retrieval (2012) 0.00 
    0.0016691206 = product of:
  0.0033382413 = sum of:
    0.0033382413 = product of:
      0.0066764825 = sum of:
        0.0066764825 = weight(_text_:e in 97) [ClassicSimilarity], result of:
          0.0066764825 = score(doc=97,freq=6.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.13753214 = fieldWeight in 97, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0390625 = fieldNorm(doc=97)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  19. Hyvönen, E.; Leskinen, P.; Tamper, M.; Keravuori, K.; Rantala, H.; Ikkala, E.; Tuominen, J.: BiographySampo - publishing and enriching biographies on the Semantic Web for digital humanities research (2019) 0.00 
    0.0016691206 = product of:
  0.0033382413 = sum of:
    0.0033382413 = product of:
      0.0066764825 = sum of:
        0.0066764825 = weight(_text_:e in 5799) [ClassicSimilarity], result of:
          0.0066764825 = score(doc=5799,freq=6.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.13753214 = fieldWeight in 5799, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5799)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
  20. Rüther, M.; Fock, J.; Schultz-Krutisch, T.; Bandholtz, T.: Classification and reference vocabulary in linked environment data (2011) 0.00 
    0.0016353976 = product of:
  0.003270795 = sum of:
    0.003270795 = product of:
      0.00654159 = sum of:
        0.00654159 = weight(_text_:e in 4816) [ClassicSimilarity], result of:
          0.00654159 = score(doc=4816,freq=4.0), product of:
            0.048544887 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03377341 = queryNorm
            0.13475344 = fieldWeight in 4816, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.046875 = fieldNorm(doc=4816)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Language
    e
    Source
    Classification and ontology: formal approaches and access to knowledge: proceedings of the International UDC Seminar, 19-20 September 2011, The Hague, The Netherlands. Eds.: A. Slavic u. E. Civallero

Authors

Languages

  • e 116
  • d 3
  • More… Less…

Types

  • a 71
  • m 34
  • el 25
  • s 11
  • x 3
  • r 1
  • More… Less…

Themes

Subjects

Classifications