TI - GOvernment services PT - JOUR DP - 1949 TA - Journal of the American Medical Association pages = {315-316}, VI - 139 IP - 5 AID - 10.1001/jama.1949.02900220041013 [doi] 4100 - http://dx.doi.org/10.1001/jama.1949.02900220041013 SO - Journal of the American Medical Association January 29, 1949 139(5):315