Rockville, Md. : U.S. Dept. of Health, Education and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics
1975
Rockville, Md. : U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics : For sale by the Supt. of Docs., U.S. G.P.O.
1996