TI  - CLinical obstetrics
PT  - JOUR
DP  - 1939
TA  - Journal of the American Medical Association
pages = {1250},
VI  - 113
IP  - 13
AID  - 10.1001/jama.1939.02800380068037 [doi]
4100  - http://dx.doi.org/10.1001/jama.1939.02800380068037
SO  - Journal of the American Medical Association September 23, 1939 113(13):1250