RT Journal T1 DIrectory of pediatric societies JF American Journal of Diseases of Children JO American Journal of Diseases of Children YR 1939 FD August 1 VO 58 IS 2 SP 450 OP 456 DO 10.1001/archpedi.1939.01990080226031 UL http://dx.doi.org/10.1001/archpedi.1939.01990080226031 AB