192,895 DEFINITION Definition of terms in mental health, alcohol abuse, drug abuse, and mental retardation. Methodology reports. Prepar. by Definitions and Classifications Committee.. , Rockville 1973 U.S.Department of Health, Education, and Welfare. Alcohol, Drug Abuse, and Mental Health Administration 4° s. nlb. 8, 123. National Institute of Mental Health - Mental Health Statistics Ser. no 8.