References
Notes
- van de Walle Etienne Fertility in Nigeria The Demography of Tropical Africa et al. Princeton 1968 515 527
- 1965 . An approach to the study of fertility in Nigeria . Population Studies , 19 ( 1 ) July : 5 – 16 .
- Caldwell , John . 1968 . The control of family size in tropical Africa . Demography , 5 ( 2 ) : 598 – 616 .