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Schulz, H.: BBK/A: Bibliothekarisch-bibliographische Klassifikation. Adaptierte Fassung. Werbeschrift (1987)
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Library of Congress Subject Headings : a guide to subdivision practice (1981)
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Fröschner, G.; Helbig, G.; Schulz, H.: Richtlinie für die Adaption der sowjetischen Bibliothekarisch-bibliographischen Klassifikation (1981)
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