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Alex, H.; Heiner-Freiling, M.: DDC-Sachgruppen der Deutschen Nationalbibliografie : Leitfaden zu ihrer Vergabe (2004)
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Alex, H.; Heiner-Freiling, M.: DDC-Sachgruppen der Deutschen Naitonalbibliografie : Leitfaden zu ihrer Vergabe (2003)
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Einheitliche Regeln für Erschließung der Nationalbibliographien (2004)
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Heiner-Freiling, M.: Dewey in der Deutschen Nationalbibliographie? (2002)
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Potempa, T.; Franke, P.; Osowski, W.; Schmidt, M.-E.: Informationen finden im Internet : Leitfaden für die gezielte Online-Recherche (1998)
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