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  • × author_ss:"Porstmann, R."
  • × theme_ss:"Klassifikationssysteme"
  • × year_i:[1990 TO 2000}
  1. Porstmann, R.: ¬Eine universelle Fachklassifikation Wirtschaftswissenschaften : ein Entwurf für Bibliotheken, Dokumentations- und Informationseinrichtungen (1995) 0.04
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