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Chan, L.M.: Library of Congress class numbers in online catalog searching (1989)
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Dailey, J.E.: Subject headings (1980)
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Greenberg, A.M.: Scope notes in Library of Congress Subject Headings (1981)
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Otchere, F.F.: African studies thesaurus : subject headings for library uses (1992)
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Subject cataloging manual : Subject headings (1991)
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