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Balaam, A.: Approaches to library catalogues (1993)
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Pejtersen, A.M.: ¬A new approach to design of document retrieval and indexing systems for OPAC users (1993)
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Poo, D.C.C.; Khoo, C.S.G.: Online Catalog Subject Searching (2009)
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Hauffe, H.: ¬Ein OPAC-Konzept für die wissenschaftlichen Bibliotheken Österreichs (1988)
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Koopman, R.: ¬The Pica Micro OPC (1995)
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