The national ambulatory medical care survey. 1977 summary. United States, January-December 1977.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000553:Ambulatory Care / Q000706:statistics & numerical data*; D002648:Child; D003710:Demography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D012737:Sex Factors; D014481:United States