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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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Classification in the 1970s. A second look (1976)
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Reader in classification and descriptive cataloging (1972)
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Datenbasen - Datenbanken - Netzwerke : Praxis des Information Retrieval (1979-80)
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Indexers on indexing : a selection of articles published in "The Indexer" (1978)
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