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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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Subject headings : the future of subdivisions in the Library of Congress Subject Headings system; report from the subject divisions conference sponsored by the Library of Congress, May 9-12, 1991 (1992)
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¬The LCSH century : One hundred years with the Library of Congress Subject Headings system (2000)
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¬The LCSH century : One hundred years with the Library of Congress Subject Headings system (2000)
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Principles underlying subject heading languages (SHLs) (1999)
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