1. Worldwide patterns of infertility: is Africa different?;Cates;Lancet,1985
2. Fertility and child mortality south of the Sahara;Page,1972
3. The demographic evidence for the incidence and cause of abnormally low fertility in tropical Africa;Caldwell;Wld Hlth Statist. Q.,1983
4. Infertility and sub-Saharan Africa;Frank,1983
5. Infertility and Sub-Saharan Africa: estimates and implications;Frank;Pop. dev. Rev.,1983