United States--Great Lakes, Lake Superior--Wisconsin, Ashland and Washburn harbors /
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| Format: | Government Document Map Journal |
| Language: | English |
| Published: |
Washington, D.C. :
The Survey ;
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| Subjects: |
| Item Description: | Depths shown by isolines and soundings. Relief shown by contours. "Soundings in feet." Includes table of low water datum for Lake Superior. |
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| Physical Description: | maps : color ; 74 x 64 cm. |