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Ruffin, B.: Toward a sound national program in cataloging (1949)
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Mann, M.: Introduction to cataloging and the classification of books (1943)
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- Grundlagen u. Einführungen: Allgemeine Literatur
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Pettee, J.: Subject headings: the history and theory of the alphabetical subject approach to books (1946)
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Nyholm, J.: ¬The code in the light of the critics (1941)
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