TI - GOvernment services PT - JOUR DP - 1949 TA - Journal of the American Medical Association pages = {723-724}, VI - 139 IP - 11 AID - 10.1001/jama.1949.02900280039015 [doi] 4100 - http://dx.doi.org/10.1001/jama.1949.02900280039015 SO - Journal of the American Medical Association March 12, 1949 139(11):723