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  • × theme_ss:"Indexierungsstudien"
  1. Morris, L.R.: ¬The frequency of use of Library of Congress Classification numbers and Dewey Decimal Classification numbers in the MARC file in the field of library science (1991) 5.64
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  2. Boll, J.J.: DDC classification rules : an outline history and comparison of two sets of rules (1988) 5.64
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