Rockville, Md. : Division of Epidemiology and Statistical Analysis, National Institute on Drug Abuse, U.S. Dept. of Health and Human Services, Public Health Service, Alcohol, Drug Abuse, and Mental Health Administration, 1988
Rockville, Md. : Division of Epidemiology and Statistical Analysis, National Institute on Drug Abuse, U.S. Dept. of Health and Human Services, Public Health Service, Alcohol, Drug Abuse, and Mental Health Administration, 1988