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Jeffreys, A.: OPAC use at Newcastle (1991)
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¬A graphical user interface : the case of the British Library network OPAC (1996)
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Mowat, R.M.: ¬The golden retriever bites back : using the catalogue for user surveying (1996)
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Marle, G.A.J.S. v.; Skaliks, M.: Some statistics about the searching behaviour of users of the OPAC of the Twente University Library (1994)
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Brown, J.M.: ¬The multifile OPAC environment : a manageable approach to developing an instruction program (1993)
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