title: A comparison of the phonological systems of mental age matched, normal, severely subnormal and Down's syndrome children.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000503:physiopathology*; D008297:Male; D010700:Phonetics; D013064:Speech Disorders / Q000503:physiopathology