Proceedings of a Symposium on Information systems organized by the IAEA and co-sponsored by the FAO of the united nations and the UNESCO held in Varna, Bulgaria, 30 September - 3 October 1974
(1975)
Proc. of the International Symposium on the Use of Isotopes...., jointly organized by the IAEA and the FAO of the United Nations and held in Vienna, 7 - 11 May 1979
(1980)
Proceedings of a study week on the use of fertilizers and their effect on crop growth, with emphasis on quality and economy, April 10th-16th, 1972
(1974)
