Use of special aids: United States--1977.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006306:Health Surveys; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009983:Orthopedic Equipment / Q000706:statistics & numerical data*; D012737:Sex Factors; D012775:Shoes; D012959:Socioeconomic Factors; D014481:United States; D014910:Wheelchairs