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Large, J.A.: Evaluating online and CD-ROM reference sources (1989)
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Large, J.A.: Evaluation of electronic media as reference sources (1991)
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Blake, P.: Who will be the king ... of the portals? : There is a lot of competition to be the alpha business information site (1999)
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Williams, M.E.; Burgard, D.E.: New database products : social science, humanities, news and general (issue 12) (1998)
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Price, A.: Five new Danish subject gateways under development (2000)
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