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  • × author_ss:"Maassen, B."
  1. Kelm, B.; Maassen, B.: Zentrale Dienstleistungen der Deutschen Bibliothek im Bereich der Sacherschließung (1980) 8.81 
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    Kelm, B.
  2. Kelm, B.; Maassen, B.: Weiterentwicklung der Sacherschließungsarbeit an der Deutschen Bibliothek (1982) 8.81 
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    Kelm, B.