Maps of Great Lakes
Scale: 1 : 1200000
Description: 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.
Creator: War Department, Corps of Engineers
Publisher: U.S. Lake Survey Office
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