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Library of Congress Subject Headings (2004)
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Ferl, T.E.; Millsap, L.: Subject cataloging : a how-to-do-it workbook (1991)
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Hoerman, H.L.; Furniss, K.A.: Turning practice into principles : a comparison of the IFLA Principles underlying Subject Heading Languages (SHLs) and the principles underlying the Library of Congress Subject Headings system (2000)
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Studwell, W.E.: Why not an 'AACR' for subject headings? (1985)
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Svenonius, E.; McGarry, D.: Objectivity in evaluating subject heading assignment (1993)
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