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  3. Wilfrid [Author] ; Helal, Ahmed H. [Other]; Lancaster, Frederick Wilfrid [Honoree]; Helal, Ahmed Helmi [Editor]; Lancaster, F. Wilfrid [Honoree]; Weiss, Joachim W. [Other] Universitätsbibliothek Essen, International Essen Symposium 17 1994 Essen

    Information superhighway: the role of librarians, information scientists, and intermediaries ; Festschrift in honor of Frederick Wilfrid Lancaster ; 17. International Essen Symposium, 24 October - 27 October 1994

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    Essen: Universitätsbibliothek, 1995

    Published in: Universitätsbibliothek: Veröffentlichungen der Universitätsbibliothek Essen ; 18

  4. Helal, Ahmed H. [Other]; Line, Maurice B. [Honoree]; Helal, Ahmed Helmi [Editor] ; Universitätsbibliothek Essen, Essen Symposium 11 1988

    The impact of CD-ROM on library operations and universal availability of information : Festschr. in honor of Dr. Maurice B. Line

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    Essen, 1989

    Published in: Universitätsbibliothek: Veröffentlichungen der Universitätsbibliothek Essen ; 11

  5. Helal, Ahmed H. [Other]; Weiss, Joachim W. [Other]; Bivins Noerr, Kathleen [Other]; Helal, Ahmed H. [Editor] ; Gesamthochschulbibliothek Essen, Essen Symposium 8 1985

    Future of online catalogues : Essen Symposium, 30 Sept. - 3 Oct. 1985

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    Essen: Gesamthochschulbibliothek, 1986

    Published in: Gesamthochschulbibliothek: Veröffentlichungen der Gesamthochschulbibliothek Essen ; 800