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Heinrich, G.: Gegenwärtiger Stand und aktuelle Tendenzen der Sacherschließung in Universalbibliotheken (1978)
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Heinrich, G.: Klassifikatorische Sacherschließung in deutschen Bibliotheken (1978)
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Braun, H.: Sacherschließung 1978 (1979)
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LaFontaine, H.; Otlet, P.: ¬Die Schaffung einer Universalbibliographie (1978)
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Klotz, D.: ¬Die Entwicklung der Sacherschließung in deutschen Öffentlichen Bibliotheken (1900 - 1945) (1977)
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