1927
Ford Motor Company
1:500k
1901
International Boundary Commission
1:60k
1876
Ward, J.W.
1:665k
1901
International Boundary Commission
1:60k
1950
Avey, George M.
1960
Allen, Norton
1951
United States. Air Force
1:500k
1853
1858
Campbell, Albert
1:602k
1953
Allen, Norton