Board of U. S. civil service examiners, Department of Army, Camp Detrick, Frederick, M. [announces] Federal employment opportunities open for Engineer, GS-9, $5,060 per annum, GS-11, $5,940 per annum, GS-12, $7,040 per annum, GS-13, $8,360 per annum, GS-14, $9,600 per annum, at Camp Detrick, Frederick, Md., announcement 4-7-6 (1952).