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Williams, M.E.; Gaylord, H.A.: New database products : business and law (issue 11) (1997)
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Schlegl, K.: ¬The reference world expands : new options for answering questions (1998)
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Meyer, R.W.: Selecting electronic alternatives (1993)
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Jascó, P.: CD-ROM commentaries : the speed of the retrieval software (1996)
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Poynder, R.: Web research engines? (1996)
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