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  • × year_i:[1920 TO 1930}
  1. Schmid, F.: ¬Der alphabetische Sachkatalog mit besonderer Beziehung auf die Landesbibliothek in Stuttgart (1924) 0.01 
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    Source
    Zentralblatt für Bibliothekswesen. 41(1924), S.12-38,104-137
  2. Lotka, A.J.: ¬The frequency distribution of scientific productivity (1926) 0.01 
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    Source
    Journal of the Washington Academy of Science. 16(1926) no.12, S.317-323

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