1878
Campbell, A.
1:127k
1878
NORTH AMERICAN BOUNDARY COMMISSION
1:127k
1921
International Boundary Commission
1:63k
1922
International Boundary Commission
1:63k
1878
Twining, W.J.
1:507k
1878
Campbell, A.
1:127k
1935
C&GS
1:500k
1903
Rand McNally and Company
1:2m
1948
Hammond, C.S.
1:2m
1927
National Map Company
1:2m