(U.S. Naval Air Station, Moffett Field, California). Airship Buoyancy, Manual No. 1. A & R Dept of Information, Moffett Field, 1942. 16pp, illus with drawings on each page (as shown), 5x7.25", card covers. A very rare airship manual from the height of WWII. About good+, light cover toning, contents excellent.