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Tenopir, C.; Neufang, R.: Electronic reference options : how they stack up in research libraries (1992)
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McAllister-Harper, D.: Dewey Decimal Classification in the online environment : a study of libraries in North Carolina (1990)
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Pao, M.L.: Retrieval differences between term and citation indexing (1989)
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Kluegal, K.; Loehr, E.: 'Can I find it on PAIS?' : Comparing PAIS on CD-ROM and PAIS on DIALOG. (1990)
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Flood, E.: Subject searching in BIBSYS (1991)
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