1973
NOS Lake Survey Center
1:120k
1973
NOS Lake Survey Center
1:120k
1928
International Boundary Commission
1:63k
1878
Campbell, A.
1:127k
1878
Campbell, A.
1:127k
1919
NOS Lake Survey Center
1:40k
1878
Twining, W.J.
1:507k
1878
Campbell, A.
1:127k
1973
U.S. Lake Survey
1:1m
1879
Rand McNally and Company
1:2m