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Schnelling, H.M.: Online-Benutzerkataloge in Großbritannien (1987)
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Cremer, M.: Online-Benutzerkataloge (OPACs) (1990)
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Schulz, U.: Einige Aspekte zukünftiger Inhaltserschließung und Online-Benutzerkataloge (1990)
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Schäfer, U.; Skalski, D.: Lokale, stand-alone Online-Benutzerkataloge (OPAC) : Entwicklungsstand, Grundlagen und Probleme unter besonderer Berücksichtigung des Mikrocomputereinsatzes (1986)
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Schnelling, H.M.: Möglichkeiten und Grenzen der Sacherschließung im Hinblick auf Online-Benutzerkataloge : Anmerkungen zur Situation in der Bundesrepublik Deutschland (1989)
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