00725nam 2200169z- 450 9910712742003321(CKB)5470000002496754(EXLCZ)99547000000249675420230509c1973uuuu -u- -engPrevalence of selected chronic respiratory conditions : United States - 1970U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health StatisticsRockville, MdPrevalence of selected chronic respiratory conditions BOOK9910712742003321Prevalence of selected chronic respiratory conditions : United States - 19703320214UNINA