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Mühlner, M.: ¬"Der erste Bibliothekar, den Deutschland je aufzuweisen hatte" : Johann Michael Francke (1717-1775) (2000)
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Satija, M.P.: Ranganathan and classification (1992)
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Wiegand, W.A.: ¬The "¬Amherst method" : the origins of the Dewey Decimal Classification Scheme (1998)
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Kumar, K.: Historical roots of Ranganathan's Colon Classification (Edition 1) (1992)
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