1. Intervals between confinements;Dandekar;Eugenics Quart.,1959
2. La Population de Crulai, paroisse normande: Étude historique;Gautier,1958
3. The Trend and Pattern of Fertility in Great Britain;Glass,1954
4. Sexual Behavior in the Human Female;Kinsey,1953
5. Statistical contributions to the study of human fertility;Tietze;Fertil. & Steril.,1956