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Marchitelli, A.; Piazzini, T.: OPAC, SOPAC e social networking : cataloghi di biblioteca 2.0? (2008)
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Wakimoto, J.C.: Electronic resources : approaches in providing access (2003)
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Larsen, G.: Advances in OPACs in Europe : an overview (1994)
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Mi, J.; Weng, C.: Revitalizing the library OPAC : interface, searching and display challenges (2008)
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Poo, D.C.C.; Khoo, C.S.G.: Online Catalog Subject Searching (2009)
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