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Lipow, A.G.: ¬The virtual reference librarian's handbook (2003)
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Informationsdienst an Öffentlichen Bibliotheken der Bundesrepublik Deutschland (1986)
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Bauer, R.: ¬Die digitale Bibliothek von Babel : über den Umgang mit Wissensressourcen im Web 2.0 (2010)
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