International Atomic Energy Agency, Vienna (Austria); Food and Agriculture Organization of the United Nations, Rome (Italy); United Nations Educational, Scientific and Cultural Organization, 75 - Paris (France); Proceedings series; p. 83-92; ISBN 9200700756; ; 1975; IAEA; Vienna; Symposium on information systems: connection and compatibility; Varna, Bulgaria; 30 Sep 1974; IAEA-SM--189/25