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  • × year_i:[1920 TO 1930}
  1. Füchsel, J.: ¬Ein schwedisches Realkatalogschema (1922) 0.01 
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    Source
    Zentralblatt für Bibliothekswesen. 39(1922), S.29-35
  2. Jevons, W.S.: ¬The principles of science : a treatise on logic and scientific method (1924) 0.00 
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  3. Lotka, A.J.: ¬The frequency distribution of scientific productivity (1926) 0.00 
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    Source
    Journal of the Washington Academy of Science. 16(1926) no.12, S.317-323

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