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Cloughley, K.: Digital reference services : how do the library-based services compare with the expert services? (2004)
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McCrea, R.: Evaluation of two library-based and one expert reference service on the Web (2004)
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Kenney, A.R.; McGovern, N.Y.; Martinez, I.T.; Heidig, L.J.: Google meets eBay : what academic librarians can learn from alternative information providers (2003)
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Shachaf, P.: ¬The paradox of expertise : is the Wikipedia Reference Desk as good as your library? (2009)
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Butkovich, N.J.; Browning, M.M.; Taylor, K.L.: ¬The Reference Expert : a coputerized database utilizing INMAGIC and a WORM drive (1991)
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