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1
Impact of new information technology on International Library Cooperation : Essen Symposium, 8 September-11 September 1986 /
Published 1987Conference Proceeding Book -
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3
Information technology and library management : 13th International Essen Symposium, 22 October-25 October 1990 : festschrift in honour of Margaret Beckman /
Published 1991Conference Proceeding Book -
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