Visitation and vacation rates of the institutionally retarded.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D002674:Child, Institutionalized; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D007360:Intelligence; D007902:Length of Stay; D008297:Male; D012923:Social Class; D012959:Socioeconomic Factors; D014195:Travel