1. Les facteurs de la fecondite non dirigee
2. Notestein, F. W. The Economics of Population and Food Supplies’. Proceedings of the Eighth International Conference of Agricultural Economists. London. in
3. Frank Knight as Colleague
4. Coale, A. J. Factors Associated with the Development of Low Fertility: An Historic Summary’. Proceedings of the World Population Conference. Vol. II, pp.205–209. United Nations. in