00806nam 2200169z- 450 9910712393303321(CKB)5470000002492195(EXLCZ)99547000000249219520230509c1984uuuu -u- -engPatterns of ambulatory care in internal medicine : 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 internal medicine BOOK9910712393303321Patterns of ambulatory care in internal medicine : the National Ambulatory Medical Care Survey, United States, January 1980-December 19813334732UNINA