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Reference and information services : an introduction (2001)
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Schmidt, D.; Allison, M.; Clark, K.; Jacobs, P.; Porta, M.: Guide to reference and information sources in plant biology (2005)
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Naumann, M. (Bearb.): Diderots Enzyklopädie : eine Auswahl (2001)
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Weilenmann, A.-K.: Fachspezifische Internetrecherche : für Bibliothekare, Informationsspezialisten und Wissenschaftler (2001)
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Lipow, A.G.: ¬The virtual reference librarian's handbook (2003)
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