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Ulrich, P.S.: Collaborative Digital Reference Service : Weltweites Projekt (2001) 0.01

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Date: 20. 4.2002 17:30:22

Sauer, C.-D.; Ulrich, P.S.: Zuverlässige Brücke zu den Informationen im Netz : Von der Allgemeinen Auskunft der Amerika-Gedenkbibliothek zum Referat Informationsdienste der Zentral und Landesbibliothek Berlin (2004) 0.00

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Date: 8.10.2004 12:07:22