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Molitor, K.: Zu den Vorschlägen betreffend einheitlichen Zetteldruck I (1905)
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- Zentralblatt für Bibliothekswesen. 22(1905), S.129-135
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Focke, R.: Classification: the general theory (1904)
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Borden, W.A.: On classifying fiction (1909)
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Kuhnert, E.: Zu Ermans Vorschlag einer einheitlichen Katalogisierung der preußischen Bibliotheken (1904)
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Becker, J.: Informationsstaat und Wissensmarkt : 'IuD' und 'F&E' als Indikatoren (19??)
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Immroth, J. P.: Library of Congress Classification (19??)
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Pobukovsky, M.: Unesco-cooperative development and promotion of the CDS/ISIS system (19??)
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