References
- Carswell , J. W. , Lloyd , G. and Howells , J. 1989 . Prevalence of HIV-1 in east African lorry drivers . AIDS , 3 : 759 – 761 .
- Wawer , M. J. , Serwadda , D. , Musgrave , S. D. , Konde-Lule , J. K. , Musagara , M. and Sewankambo , N. K. 1991 . Dynamics of spread of HIV-1 infection in a rural district in Uganda . British Medical Journal , 303 : 1303 – 6 .