Hudson, James J. Hostile skies; a combat history of the American Air Service in World War I / [by] James J. Hudson. - Syracuse, N.Y.] : Syracuse Univ., 1968. - 338 p. : ill., maps. LCCN: 68015913 Subjects--Topical Terms: World War, 1914-1918--Aerial operations.U.S. Army. Air Corps. Dewey Class. No.: 940.4