Hildreth, Charles H. 1001 questions answered about aviation history, [electronic resource] / by C. H. Hildreth and Bernard C. Nalty.. — New York, : Dodd, Mead, [1969]. — xii, 419 p. : illus. 22 cm. Bibliography: p. 385-386. LCCN: 68009453 Subjects--Topical Terms: Aeronautics--History. LC Class. No.: TL515 / .H56 Dewey Class. No.: 629.13/009