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  • × type_ss:"a"
  • × year_i:[1920 TO 1930}
  1. 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
  2. Hertley, R.V.L.: Transmission of information (1928) 0.00 
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  3. Fellows, D.: Library of Congress Classification vs. decimal classification (1925) 0.00 
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