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author_ss:"Heydrich, J."
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Heydrich, J.; Schmelter, G.: Einsatz von Retrieval-Geräten bei Microfiche-Arbeiten in Zentralkatalogen und Bibliotheken (1982)
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Heydrich, J.: ¬Die Rolle der Zentralkataloge als Leihverkehrszentralen : Heute und Morgen (1997)
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