NY: Ronald Press Co., 1927. Blakemore, Thomas L. & W. Watters Pagon. PRESSURE AIRSHIPS. Part I. Nonrigid Airships. By Thomas L. Blakemore. Part II. Semirigid Airships. By W. Watters Pagon. New York: Ronald Press Co., (1927). 311p, cloth, illus. (one folded), covers lightly worn, name on endpaper, many notes in.....
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