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Kowalk, W.: ¬Der OPAC der Universitätsbibliothek Saarbrücken (1989)
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Kowalk, W.: ¬Der OPAC der Universitätsbibliothek Saarbrücken (1991)
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Kowalk, W.: Probleme beim Einstieg in die EDV-Sacherschließung unf Lösungsvorschläge nach dem Eppelsheimer System (1990)
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Kowalk, W.: ¬Der OPAC der Universitätsbibliothek Saarbrücken (1991)
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Kowalk, W.: ¬Der Saarbrücker Sachkatalog nach der Methode Eppelsheimer im OPAC (1992)
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