- Food and Agriculture Organization of the United Nations (26)
- International Atomic Energy Agency (6)
- International Office of Epizootics (2)
- World Health Organization (2)
- Seminar on Radioisotopes and Radiation in Dairy Science and Technology, Vienna, 1966 (1)
- Symposium on the Nature, Induction and Utilization of Mutations in Plants (1)
- Symposium on the Use of Isotope and Radiation Techniques in Soil Physics and Irrigation Studies (1)
- Symposium on the Use of Isotopes and Radiation in Entomology (1)
- Symposium on the Use of Isotopes in Plant Nutrition and Physiology (1966 : Vienna, Austria) (1)
- Symposium on the Use of Radioisotopes in Soil-Plant Nutrition Studies (1)
- Unesco (1)