Rockville, Md. : U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, 1974
National ambulatory medical care survey : background and methodology, United States, 1967-72 / [by James B. Tenney, Kerr L. White, and John W. Williamson].
Series Titles:
Vital and health statistics ; Series 2. Data evaluation and methods research ; no. 61 DHEW publication ; no. (HRA) 74-1335 Vital and health statistics. no. 61. DHEW publication ; no. (HRA) 74-1335.