1878
Campbell, A.
1:127k
Twining, W.J.
1:507k
1919
NOS Lake Survey Center
1:40k
1928
International Boundary Commission
1:63k
1973
1:120k
1874
Andreas, A. T. (Alfred Theodore), 1839-1900
1:760k
1903
Rand McNally and Company
1:1m
1932
1879
1:2m
