USA Public Roads Administration. (1939). Toll roads and free roads: Message from the President of the United States transmitting a letter from the Secretary of Agriculture, concurred in by the Secretary of War, enclosing a report of the Bureau of Public Roads, United States Department of agriculture, on the feasibility of a system of transcontinental toll roads and a master plan for free highway development. US Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)USA Public Roads Administration. Toll Roads and Free Roads: Message from the President of the United States Transmitting a Letter from the Secretary of Agriculture, Concurred in by the Secretary of War, Enclosing a Report of the Bureau of Public Roads, United States Department of Agriculture, on the Feasibility of a System of Transcontinental Toll Roads and a Master Plan for Free Highway Development. Washington: US Gov. Print. Off, 1939.
MLA-Zitierstil (9. Ausg.)USA Public Roads Administration. Toll Roads and Free Roads: Message from the President of the United States Transmitting a Letter from the Secretary of Agriculture, Concurred in by the Secretary of War, Enclosing a Report of the Bureau of Public Roads, United States Department of Agriculture, on the Feasibility of a System of Transcontinental Toll Roads and a Master Plan for Free Highway Development. US Gov. Print. Off, 1939.