00836nam 2200169z- 450 9910712391003321(CKB)5470000002492218(EXLCZ)99547000000249221820230509c1983uuuu -u- -engPatterns of ambulatory care in general and family practice : the National Ambulatory Medical Care Survey, United States, January 1980-December 1981U.S. Department of Health and Human Services, Public Health Service, National Center for Health StatisticsHyattsville, MdPatterns of ambulatory care in general and family practice BOOK9910712391003321Patterns of ambulatory care in general and family practice : the National Ambulatory Medical Care Survey, United States, January 1980-December 19813334709UNINA