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A letter from the Secretary of War, transmitting, with a letter from the Chief of Engineers, a report of a Board of Engineers on the practicability and approximate cost of tunneling the Detroit River at or near Detroit, Michigan, in compliance with the joint resolution of April 19, 1890; 51st Congress, 1st Session, Ex. Doc. no. 369
United States. House of Representatives
Detroit River, Windsor Detroit Tunnel, Tunnels, International Border Crossings
Canadian History | Engineering | History
Proctor, Redfield, "Tunneling Detroit River" (1890). SWODA: Windsor & Region Publications. 5.
To view online at the Internet Archive: https://archive.org/details/TunnelingDetroitRiver