Physical Description: 1. “Soldier’s Handbook,” Basic Field Manual, War Department, #FM 21-100, July 23, 1941. 2. “Silhouette Handbook of United
States Army Air Forces Airplanes,” September 1942. 3. “Exercises on Maintenance and Inspection Forms,” Army Air Forces Technical
School, #M-AB-C-2, April 8, 1943.