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  • × year_i:[1990 TO 2000}
  1. Nahl-Jakobovits, D.; Tenopir, C.: Databases online and on CD-ROM : how they differ, let us count the ways (1992) 10.09 
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  2. Hjoerland, B.: ¬The classification of psychology : a case study in the classification of a knowledge field (1998) 10.09 
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