1. Population studies on the prevalence of rheumatic diseases in Liberia and Nigeria;S, Muller A.,1970
2. Rheumatoid arthritis in a tribal Xhosa population in the Transkei, Southern Africa;Meyers 0 L, Daynes G, Beighton P;Ann Rheum Dis,1977
3. Rheumatoid arthritis in an urban South African Negro population;Solomon, L.; Robin, G.; A, Valkenburg H.;Ann Rheum Dis,1975
4. Rheumatoid arthritis in a rural South African Negro population;Beighton, P.; Solomon, L.; A, Valkenburg H.;Ann Rheum Dis,1975
5. Rheumatoid arthritis;in Western Nigeria. I, Greenwood B.M.Polyarthritis;Ann Rheum Dis