Recherche dans la collection - [Great Lakes-St. Lawrence Canal System, consisting of:] 1. St. Lawrence River International Rapids Section [8 3/4" x 52 1/2"; 1 inch of 1 1/8 miles]; 2. St. Lawrence River Thousand Islands Section [8 3/4" x 34"; 1 inch to 2 1/4 miles]; 3. Lake Erie-Lake Ontario [8 3/4" x 22 1/2"; 1 inch to 20 miles]; 4. Detroit River [8 3/4" x 25 1/2"; 1 inch to 8000 feet]; 5. Lake St. Clair [8 3/4 " x 12 3/4"; 1 inch to 16,000 feet]; 6. St. Clair River [8 3/4" x 27 1/4"; 1 inch to 8000 feet]; 7. Lake Huron [8 3/4" x 14 1/4"; 1 inch to 20 miles]; 8. St. Mary's River [8 3/4 " x 25 1/2"; 1 inch to 16,000 feet]; 9. Lake Superior [8 3/4" x 19"; 1 inch to 20 miles] [cartographic material]

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