United States--Great Lakes, Lake Superior, Michigan, Keweenaw Waterway, including Torch Lake / Coast Survey.
- Depths shown by isolines and soundings. Relief shown by contours and spot heights. Shipping list no.: 2004-0047-S. "Soundings in feet." Inset: Hancock and Houghton Michigan. Scale 1:10,000. Includes source diagram and table of low water datum for Lake Superior.
- U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Coast Survey ;
- Held by
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