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3. A. Thorley, ‘Longitudinal studies of drug dependence’ in G. Edwards and C. Busch (eds.) Drug Problems in Britain: A Review of Ten Years (London: Academic Press, 1981), pp. 117–169.
4. M. Mitcheson, ‘Drug clinics in the 1970s’ in J. Strang and M. Gossop (eds.), Heroin Addiction and Drug Policy: The British System (Oxford, New York and Tokyo: Oxford University Press, 1994), pp. 179–191.
5. R. Hartnoll, M. C. Mitcheson, A. Battersby, G Brown, M Ellis, P. Fleming, and N. Hedley, ‘Evaluation of heroin maintenance in controlled trial’, Archives of General Psychiatry, 37 (1980), 877–884.