by I.M. Trakhtenberg. Translated from the Russian language by the Geographic Health Studies Program of the John E. Fogarty International Center for Advanced Study in the Health Sciences
[Bethesda, Md.] : U.S. Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health; for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington, 1974