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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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Radford, W.: Cataloges, codes and bibliographical control (1949)
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Weaver, W.: ¬The mathematics of communication (1949)
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Pitts, W.; McCulloch, W.S.: How we know universals : the perception of auditory and visual frames (1947)
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Kerr, W.: ¬The professor looks at the card catalog (1942)
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Shannon, C.E.; Weaver, W.: ¬The mathematical theory of communication (1949)
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