Speech defects and mental retardation. Survey in Oregon.
D002648:Child; D002675:Child, Preschool; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D008607:Intellectual Disability / Q000150:complications*; D009922:Oregon; D011581:Psychological Tests; D012046:Rehabilitation; D012054:Reinforcement, Psychology; D013064:Speech Disorders / Q000453:epidemiology*; D013070:Speech Therapy; D014705:Verbal Behavior