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Tenopir, C.: Choices for electronic reference (1993)
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Barnes, S.J.: ¬The electronic library and public services (1994)
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Hixson, C.R.: CD-ROM and the undergraduate : reference and instruction at risk (1993)
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Paster, A.: CD-ROM versus online 1980-1994 (1994)
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Tenopir, C.; Ennis, L.: ¬The digital reference work of academic libraries (1998)
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