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Lipow, A.G.: ¬The virtual reference librarian's handbook (2003)
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New technologies and reference services (2000)
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Reference and information services : an introduction (2001)
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Duckett, R.J.; Walker, P.; Donnelly, C.: Know it all, find it fast : an A-Z source guide for the enquiry desk (2008)
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Buchner, M.: ¬Die Machete im Dschungel : Persönliche Auskunftsdienste: "Hier werden Sie geholfen" - Ratgeber sind die neue Konkurrenz für Internet-Suchmaschinen (2001)
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