Isotopes and radiation in agricultural research in the Soviet Union report of study tours conducted 2 August–10 September 1971 and 3 July–4 August 1972: Prepared by A. Micke, D. Nethsinghe and B. Sigurbjornsson. International Atomic Energy Agency Vienna, 1973, 108 p. Uniput Box 433, Murray Hill Station, N.Y. N. Y. 10016. 1974, $4.50