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  1. Wätjen, H.-J.: ORBIS, der Oldenburger Online-Benutzerkatalog (1991) 9.21
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    Author
    Wätjen, H.-J.
  2. Becker, H.J.; Diedrichs, R.; Eversberg, B.; Rath-Beckmann, A.; Wätjen, H.-J.; Zick, W.; Zillmann, H.: ¬Das PICA-System (1992) 9.21
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    Wätjen, H.-J.
  3. Wätjen, H.-J.: Hypertextbasierte OPACs im World-wide Web (1996) 9.21
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    Wätjen, H.-J.
  4. Koch, T.; Seiffert, F.; Wätjen, H.-J.: Informationen im Web anbieten und wiederfinden (1998) 9.21
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  5. Wätjen, H.-J.: GERHARD : Automatisches Sammeln, Klassifizieren und Indexieren von wissenschaftlich relevanten Informationsressourcen im deutschen World Wide Web (1998) 9.21
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    Wätjen, H.-J.
  6. Wätjen, H.-J.: Zur Realität virtueller Bibliotheken : Möglichkeiten, Aufgaben, Probleme (1999) 9.21
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    Wätjen, H.-J.
  7. Diekmann, B.; Wätjen, H.-J.: Copacabana : Computer Aided Publishing, Administrating, Cataloguing, Bibliographic and Networked Access (2000) 9.21
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    Wätjen, H.-J.