General Chart of the Northern and Northwestern Lakes
Chart showing all of the Great Lakes: Lake Superior, Lake Michigan, Lake Huron, Lake Erie, and Lake Ontario and canals, rivers and cities that border the lakes. The map also includes tables of United States and Canadian canals, annual water levels, dry docks, and marine railways.
Wisconsin Historical SocietyWar Department, Corps of Engineers
1906 - 1911
U.S. Lake Survey Office
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