TI - ROentgen technique PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {2265}, VI - 113 IP - 25 AID - 10.1001/jama.1939.02800500071041 [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.02800500071041 SO - Journal of the American Medical Association December 16, 1939 113(25):2265