This map depicts the corridor for flight navigation between Nogales and Tucson, Arizona, and Phoenix, Arizona including major urban areas, roads,... Show moreThis map depicts the corridor for flight navigation between Nogales and Tucson, Arizona, and Phoenix, Arizona including major urban areas, roads, railroads, etc., and the location of airfields and navigation beacons. It was compiled and produced by the Engineer Reproduction Plant, U. S. Army, Washington, DC in 1931. Show less