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Subject retrieval in the seventies: new directions : Proc. of an Int. Symp. ... College Park, 14.-15.5.1971 (1972)
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Rijsbergen, C.J. van: Information retrieval (1979)
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Reader in classification and descriptive cataloging (1972)
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Fuchs, H.: Kommentar zu den Instruktionen für die alphabetischen Kataloge der preußischen Bibliotheken (1973)
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