The national ambulatory medical care survey : 1977 summary, United States /
Ezzati, Trena M.
McLemore, Thomas.
Hyattsville, Md. : U.S. Dept. of Health, Education, and Welfare, Public Health Service, Office of Health Research, Statistics, and Technology, National Center for Health Statistics,
1980.
Includes bibliographical references.
Physician services utilization
Ambulatory medical care
Medical care surveys