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Wood, A.J.: OPACs in public libraries : a second look (1989)
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Ferl, T.E.; Millsap, L.: Remote use of the University of California MELVYL Library System : an online survey (1992)
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Ramesh Babu, B.; Tamizhchelvan, M.: ¬An investigation into the features of OPACs in Tamil Nadu (India) (2003)
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Casson, E.; Fabbrizzi, A.; Slavic, A.: Subject search in Italian OPACs : an opportunity in waiting? (2011)
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Oshiro, Z.; Kaji, K.: ¬A survey of Japanese Internet OPACs (1997)
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