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Cooperation between types of libraries, 1940 - 1968 : an annotated bibliography
Stenstrom, Ralph Hubert, (1970)
Towards a worldwide library : a ten year forecast
Helal, Ahmed H., (1997)
International library cooperation : 10th Anniversary Essen Symposium, 19 October - 22 October 1987 ; Festschr. in honour of Prof. Dr. Günther Pflug to his 65th birthday
Helal, Ahmed H., (1988)