1981
Waldmire, Robert
1901
International Boundary Commission
1:60k
1951
United States. Air Force
1:500k
1876
Ward, J.W.
1:665k
1931
Marbut, Curtis F.
1:3m
1950
Avey, George M.
1883
(U.S. War Department) Office of the Chief of Engineers, U.S.A.
1:475k
1853
1944
United States. Department of Commerce
1:500k
1858
Campbell, Albert
1:602k