1. Communicable Diseases Report 1991, 1: 1. (Reproduced from WHO Global Programme on AIDS. Current and Future Dimensions of the HIV/AIDS Pandemic: A Capsule Summary,1991
2. AIDS Analysis Africa 1991
3. AIDS takes hold of the World;Mann, J.,1991
4. Where did the AIDS virus come from?;McClure, M.;New Scientist,1990
5. Immunodeficiency viruses. The simian-human connection;Doolittle, R.F.;Nature,1989