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Söderholm, G.: OPAC user study : Stockholm University Library (1991)
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Bosman, F.E.; Ongering, M.A.H.; Smit, H.P.A.: Observeren en registeren : evaluatieonderzoek naar OPC3 (1993)
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Rosenthal, M.; Shupe, B.: Evaluating patron use of an online catalog (1995)
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Britain's National Bibliographic Service (1994)
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Flood, E.: Subject searching in BIBSYS (1991)
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