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Beheshti, J.: ¬The evolving OPAC (1997)
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Lee, Y.-R.: ¬A study on the conditions of using OPAC access points and subject searching by users (1997)
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Witt, M.: Survey on the use of the catalogue at the médiathèque of the cité des sciences et de l'industrie (CSI) (1993)
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Slack, F.: Subject searching on OPACs : problems and help provision (1991)
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Long, C.E.: Improving subject searching in Web-based OPACs : evaluation of the problem and guidelines for design (2000)
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