1919
1:63k
1978
1:100k
1954
1:250k
1942
International Boundary Commission
1:24k
1874
Andreas, A. T. (Alfred Theodore), 1839-1900
1:760k
1899
Walcott, Charles D.
1:511k
1878
Cram, George Franklin
1:1m
1877
Cram, George Franklin
1:1m
1866
Sewall, Joseph S.
1:760k
1865
Colton, G.W.
1:2m