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Towards a worldwide library : a ten year forecast : 19th International Essen Symposium, 23 September-26 September 1996 / edited by Ahmed H. Helal, Joachim W. Weiss.
- 020 I61217
- International Essen Symposium (19th : 1996).
- Universitatsbibliothek Essen,
- c1997.
- Essen :
-
Information superhighway : the role of librarians, informationscientists, and intermediaries : 17th International Essen Symposium, 24 October - 27 October, 1994 / edited by Ahmed H. Helal, Joachim W. Weiss.
- 021.65 E785
- Universitätsbibliothek Essen,
- c1995.
- Essen :
-
Resource sharing : new technologies as a must for universal availability of information : 16th International Essen Symposium, 18 October-21 October 1993 : Festschrift in honor of Hans-Peter Geh / edited by Ahmed H. Helal, Joachim W. Weiss.
- 021.64 I61217
- International Essen Symposium (16th : 1993)
- Universitatsbibliothek Essen,
- 1994.
- Essen :
-
Future of online catalogues : Essen symposium 30 September - 3 October 1985 / contributors, Kate Bivins Noerr ... [et al.] ; edited by Ahmed H. Helal, Joachim W. Weiss.
- 025.313 F9962
- Gesamthochschulbibliothek Essen,
- 1986.
- Essen :
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Information technology and library management : 13th International Essen Symposium, 22 October-25 October 1990 / edited by Ahmed H. Helal, Joachim W. Weiss.
- 025.004 I61217
- International Essen Symposium (13th : 1990)
- Univeistätbibliothek Essen,
- c1991.
- Essen :
-
Local library systems : Essen symposium, 24 September-27 September 1984 : festschrift in honour of Frederick G. Kilgour to his 70th birthday / edited by Ahmed H. Helal, Joachim W. Weiss.
- 025.30285 L8111
- Gesamthochschulbibliothek Essen,
- c1984.
- Essen :
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Libraries and electronic publishing : promises and challenges for the 90's : 14th Annual Essen Symposium, 14 October-17 October 1991 : festschrift in honour of Richard M. Dougherty / edited by Ahmed H. Helal, Joachim W. Weiss.
- 070.594 I61217
- International Essen Symposium (14th : 1991)
- Universittsbibliothek Essen,
- c1992.
- Essen :
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Innovation for information : international contributions to librarianship : Festschrift in honour of Dr. Ahmed H. Helal / edited by Joachim W. Weiss.
- 025.00285 I584
- Universitatsbibliothek Essen,
- c1992.
- Essen :
-
Impact of new information technology on International Library Cooperation : Essen Symposium, 8 September-11 September 1986 / contributors, Bent Barnholdt ... [et al.] ; edited by Ahmed H. Helal, Joachim W. Weiss.
- 021.64 E785
- Essen Symposium (9th : 1986).
- Essen University Library,
- c1987.
- Essen :
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Developments in microcomputing : discovering new opportunities for libraries in the 1990s : 12th International Essen Symposium, 23 October-26 October 1989 : festschrift in honour of Richard De Gennaro / edited by Ahmed H. Helal, Joachim W. Weiss.
- 025.30285416 I61217
- International Essen Symposium (12th : 1989)
- Universitatsbibliothek Essen,
- 1990.
- Essen :