TI - A biological approach to the problem of abnormal behavior. PT - JOUR DP - 1939 TA - Archives of Internal Medicine pages = {1238}, VI - 63 IP - 6 AID - 10.1001/archinte.1939.00180230223024 [doi] 4100 - http://dx.doi.org/10.1001/archinte.1939.00180230223024 SO - Archives of Internal Medicine June 1, 1939 63(6):1238