U S D C Inc

U. S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics ; Washington : for sale by the Supt. of Docs., U. S. Govt.
Rockville, Md

U. S. Dept. of Health, Education, and Welfare, Public Health Service, National Center for Health Sta
Hyattsville, Md

U.S Dept. of the Interior, U.S. Geological Survey
Reston, Va

U.S. Department of Agriculture, Forest Service
Washington, D.C

U.S. Department of Commerce

U.S. Department of Education, Office of Educational Research and Improvement
Washington, D.C

U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics
Hyattsville, MD

U.S. Department of Health and Human Services, Health Care Financing Administration
Baltimore, Md

U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and
Hyattsville, Md