
Air Service Information Circular Vol III, No. 256. GPO, Washington, 7/15/1921. 12pp, 8.25x11", wrps, 3-hole punched. Separate sections on Airplanes, Engines, Armament, Equipment, Propellers and Rust-Preventing Compounds. Very good.
Air Service Information Circular Vol III, No. 256. GPO, Washington, 7/15/1921. 12pp, 8.25x11", wrps, 3-hole punched. Separate sections on Airplanes, Engines, Armament, Equipment, Propellers and Rust-Preventing Compounds. Very good.