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  • × author_ss:"Heydrich, J."
  • × year_i:[1980 TO 1990}
  1. Heydrich, J.: Bibliographie der Bibliographien für Leitbibliotheken (1981) 0.02 
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  2. Heydrich, J.; Schmelter, G.: Einsatz von Retrieval-Geräten bei Microfiche-Arbeiten in Zentralkatalogen und Bibliotheken (1982) 0.02 
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