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Johnson, K.E.: OPAC missing record retrieval (1996)
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Ansari, M.A.A.: Awareness and use of OPACs in five Delhi libraries (2008)
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Iyer, H.; Keefe, J.M.: ¬The WordNet as an auxiliary resource to search visual image database in architecture (2003)
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Baer, N.L.; Barrett, J.A.; Johnson, K.E.: OPAC database creation problems (1995)
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Salomonsen, A.: ¬The help system of REX at the Royal Library (1991)
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