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Tygett, M.; Lawson, V.L.; Weessies, K.: Using undergraduate marketing students in an ubobtrusive reference evaluation (1996)
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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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Pomerantz, J.: ¬A linguistic analysis of question taxonomies (2005)
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