DescriptionG. Papasov M.D., S.R.O., examin[ing] an inhabitant of the endemic village Bistritza, Rila endemic region.; In Bulgaria the Postgraduate Medical Institute, Sofia, is using radioisotopes to study goitre in its Clinic of Endocrinology and Diseases of Metabolism. Dr. G. Papasov is seen here examining a resident of the village of Bistritza.
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