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Wepsiec, J.: Hierarchical structure of subject headings in the social sciences (1991)
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Knowlton, S.A.: Three decades since prejudices and antipathies : a study of changes in the Library of Congress Subject Headings (2005)
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Stover, M.: ¬The best family studies databases on CD-ROM : a survey of nine products (1993)
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Strader, C.R.: Citation analysis (2012)
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