TY - BOOK ED - American Association on Intellectual and Developmental Disabilities TI - Intellectual disability: definition, classification, and systems of supports SN - 9781935304043 (alk. paper) PY - 2010/// CY - Washington, DC PB - American Association on Intellectual and Developmental Disabilities KW - Mental retardation KW - classification N1 - Includes bibliographical references and index ER -