The National Ambulatory Medical Care Complement Survey: United States, 1980.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000553:Ambulatory Care; D003625:Data Collection; D005260:Female; D006801:Humans; D008297:Male; D008511:Medicine; D008875:Middle Aged; D009819:Office Visits; D011320:Primary Health Care; D013038:Specialization; D013223:Statistics as Topic; D014481:United States