1. The Alan Guttmacher Institute (1977). Studies Show BBT Method Fails to Pinpoint Ovulation for One-Fifth of U.S. and One-Fourth of British Women. Family Planning Perspectives, 9:131–132.
2. The Y Chromosome in Human Spermatozoa;Barlow;Nature,1970
3. Preferences for Sex of Children among U.S. Couples;Coombs;Family Planning Perspectives,1977
4. Some Roots of Preference: Roles, Activities and Familial Values;Coombs;Demography,1979
5. Familial Values in a Developing Society: A Decade of Change in Taiwan;Coombs;Social Forces,1981