Air navigation map 21 (experimental) : Cleveland, Ohio to Chicago, Ill.
Air navigation map [21] (experimental) : Cleveland, Ohio to Chicago, Ill. Compiled and reproduced by the Engineer Reproduction Plant, Corps of Engineers. Under the direction of the Airways Section, Office Chief of Air Service. 1923. Engineer Reproduction Plant, U.S. Army, Washington Barracks, D.C. 1926. 4915-21. -- Air navigation map [22] (experimental) : Chicago, Ill. to St. Louis, Mo. Compiled and reproduced by the Engineer Reproduction Plant, Corps of Engineers. Under the direction of the Airways Section, Office Chief of Air Service. 1923. Engineer Reproduction Plant, U.S. Army, Washington Barracks, D.C. 1926. 4915-22.
David RumseyFord Motor Company
1926
1930
Ford Motor Company
1:500 000