title: A method of communication for non-speaking severely subnormal children--trial results.
mesh_terms: D000293:Adolescent; D001766:Blindness; D002648:Child; D003638:Deafness; D006233:Persons with Disabilities; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D008297:Male; D009633:Nonverbal Communication; D013997:Time Factors