AU - SECKEL HG TI - PRevention of diphtheria PT - JOUR DP - 1939 TA - American Journal of Diseases of Children pages = {512-526}, VI - 58 IP - 3 AID - 10.1001/archpedi.1939.01990090066004 [doi] 4100 - http://dx.doi.org/10.1001/archpedi.1939.01990090066004 SO - American Journal of Diseases of Children September 1, 1939 58(3):512