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Beccaria, M.; Scott, D.: Fac-Back-OPAC : an open source interface to your library system (2007)
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Hammond, T.; Hannay, T.; Lund, B.; Flack, M.: Social bookmarking tools (II) : a case study - Connotea (2005)
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Joint, N.: URLs in the OPAC : comparative reflections on US vs UK practice (2007)
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Greenwood, D.: OPAC research in the UK (1989)
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Elliot, J.D.: ¬The use of OPACs (Online Public Access Catalogues) in map libraries (1991)
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