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  • × year_i:[1920 TO 1930}
  1. 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
  2. Bliss, H.E.: ¬The organization of knowledge and the system of the sciences (1929) 0.00 
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  3. Hertley, R.V.L.: Transmission of information (1928) 0.00 
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  4. Jevons, W.S.: ¬The principles of science : a treatise on logic and scientific method (1924) 0.00 
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  5. Fellows, D.: Library of Congress Classification vs. decimal classification (1925) 0.00 
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  6. Sayers, W.C.B.: ¬A manual of classification for librarians and bibliographers (1926) 0.00 
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