title: Meaning and structure of Down's syndrome and nonretarded children's spontaneous speech.
mesh_terms: D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000523:psychology*; D005260:Female; D006801:Humans; D007804:Language Development; D008297:Male; D012660:Semantics; D014705:Verbal Behavior