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  • × author_ss:"Ecker, J."
  1. Ecker, J.: ¬Die Bibliothekarisch-Bibliographische Klassifikation in der Praxis (1982) 8.12 
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  2. Ecker, J.: ¬Die Optimierung der sowjetischen Bibliothekarisch-Bibliographischen Klassifikation (1982) 8.12 
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