States' definitions and procedures for identifying children with mental retardation: comparison of 1981-1982 and 1985-1986 guidelines.
Frankenberger
W
W
Harper
J
J
D000124:Achievement; D002648:Child; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D007360:Intelligence; D014481:United States