Office visits for diseases of the respiratory system : the National ambulatory medical care survery, United States, 1975-76 /
Cypress, Beulah K.
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,
1979.
Includes bibliographical references.
Respiratory organs
Physician services utilization
Health surveys