1. Population;Peterson,1974
2. Population history and population policies from an anthropological perspective;Polgar;Curr. Anthrop.,1972
3. Norms for family size in underdeveloped areas;Freedman,1973
4. Factors Affecting Human Fertility in Nonindustrial Societies: A Cross-Cultural Study;Nag,1976
5. A Comparative Study of Human Reproduction;Ford,1945