Eighteen papers by various authors are presented. The topics discussed are: Importance of exchanges, international loans, UNESCO exchange conventions, European exchange centers, economics of exchange, collective consignments, value of publications, exchange with developing countries by the British Museum, Bibliotheque Nationale de Paris, Library of Congress, union catalog of African official publications, Korea Institute of Science and Technology, forms standardization, bibliography of exchanges, UNESCO Handbook. Some papers are in French. Selected papers are indexed separately.