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Subscribe:Subscribe to American Journal of Obstetrics & Gynecology
- Jour. Soc. Hyg. 1923; ix: 129-146
- Statistical Bulletin. vi. Metropolitan Life Insurance Company, 1925: 3
- Thirty-third Annual Report. State Department of Health, New York1912: 237
☆Work done at the George Williams Hooper Foundation for Medical Research, University of California Medical School.