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Carson, E.: OPACs: the user and subject access (1985)
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Carson, S.M.: LIAS online catalog at Penn State University (1983)
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Freivalds, D.; Carson, S.: Extending the OPAC with microcomputers (1990)
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Carson, S.M.; Freivalds, D.I.: Z39.50 and LIAS : Penn State's experience (1993)
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Freivalds, D.I.; Carson, S.M.: ¬The role of microcomputers in the evolution of the OPAC (1991)
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