Universitätsbibliothek Essen

1993978-3-922602-17-0Opportunity 2000--understanding and serving users in an electronic library: 15th International Essen Symposium, 12 October-15 October 1992 to ... (Publications of Essen University Library)
1994978-3-922602-18-7Ahmed H. Helal · Joachim W. WeissResource Sharing: New Technologies as a Must for Universal Availability of Information (16th International Essen Symposium, 18 October-21 October 1993)
1996978-3-922602-21-7A. H. /Weiss, J. W. ( Ed.) HelalElectronic documents and information: From preservation to access: 18th International Essen Symposium, 23 October-26 October 1995: festschrift in ... (Publications of Essen University Library)