1. Maternal Mortality Report: Result of a Three-year Study by the Committee on Maternal Welfare of the Philadelphia County Medical Society, 1934.
2. Maternal Mortality and Morbidity;Fraser;Jour. Amer. Med. Assoc,1935
3. Herrick, W. W.: Heart Disease in Pregnancy, Fetal, Newborn and Maternal Morbidity and Mortality, 1933.
4. White, Paul D.: Heart Disease, 1931.
5. Heart Disease in Pregnancy, Amer;Lamb;Jour. Med. Sci,1934