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  • × type_ss:"a"
  • × year_i:[1920 TO 1930}
  1. Hertley, R.V.L.: Transmission of information (1928) 0.00 
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  2. Kaiser, J.: Systematic indexing (1926) 0.00 
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  3. Fellows, D.: Library of Congress Classification vs. decimal classification (1925) 0.00 
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  4. Lotka, A.J.: ¬The frequency distribution of scientific productivity (1926) 0.00 
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  5. Below, E.: ¬Das Schlagwortregister zum Fachkatalog (1921) 0.00 
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