00840nam 2200169z- 450 9910712342503321(CKB)5470000002492708(EXLCZ)99547000000249270820230509c1979uuuu -u- -engOffice visits for diseases of the respiratory system : the National Ambulatory Medical Care Survey, United States, 1975-76Hyattsville, MdU.S. Department of Health, Education, and Welfare, Public Health Service, Office of Health Research, Statistics, and Technology, National Center for Health StatisticsOffice visits for diseases of the respiratory system BOOK9910712342503321Office visits for diseases of the respiratory system : the National Ambulatory Medical Care Survey, United States, 1975-763302728UNINA