Information Systems, their interconnection and compatibility : proceedings of a Symposium on Information Systems: Connection and Compatibility / organized by the International Atomic Energy Agency and co-sponsored by the Food and Agriculture Organization of the United Nations and the United Nations Educational, Scientific and Cultural Organization, held in Varna, Bulgaria, 30 September-3 October 1974. Symposium on Information Systems: Connection and Compatibility, Varna, Bulgaria, 1974. International Atomic Energy Agency. Food and Agriculture Organization of the United Nations. Unesco. Information storage and retrieval systems Science Congresses. Information services International cooperation Congresses. Communication in science Congresses. Z699.5.S3 S94 1974 010.78 INI English, French, or Russian; abstracts in English. Includes bibliographical references. Vienna : IAEA ; New York : sold by UNIPUB, Inc., 1975. 1975. 1975 Text [5], 470 p. : eng engfrerus Proceedings series ; International Atomic Energy Agency Proceedings series (International Atomic Energy Agency)