1. Drunks, brewers and chiefs: alcohol regulation in colonial Kenya 1900–1939;Ambler,1991
2. Multi-centre study on drug injecting and risk of HIV infection;Ball,1994
3. AIDS and IV Heroin Addicts: The preventive effect of methadone maintenance in Sweden;Blix,1988
4. HIV and harm reduction for injection drug users;Brettle;AIDS,1991
5. The evaluation of the needle/syringe exchange in Amsterdam;Buning,1988