1. 2. J. Shirley, and D. Zohar (1980 ). Britain joins big league in heroin. The Sunday Times, 24 February.
2. 3. Department of Health and Social Security (1982 ). Treatment and Rehabilitation: Report of the Advisory Council on the Misuse of Drugs. London: H.M.S.O.
3. Prevalence and early detection of heroin abuse.