U. S. Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health ; Washington : for sale by the Supt. of Docs., U. S. Govt. Print. Off.1978.<SC55-27>
U.S. Dept. of Health, Education and Welfare, Public Health Service, National Institutes of Health; Washington, for sale by the Supt. of Docs., U.S. Govt. Print. Off.1976.<SC261-10>