. . "2"^^ . . . "Nuclear techniques in the study of parasitic infections : proceedings of an international symposium on nuclear techniques in the study and control of parasitic diseases of man and animals / jointly organized by the International Atomic Energy Agency, the Food and Agriculture Organization of the United Nations and the United Nations Environment Programme, and held in Vienna, 29 June-3 July, 1981 / Vienna : International Atomic Energy Agency , 1982" . . . "1982"^^ . . . . .