Geologic map of the Embarrass quadrangle, St. Louis County, Minnesota [cartographic material] / by W.L. Griffin.
- Relief shown by contours and spot heights. "Contour interval 10 feet." "Base from U.S. Geological Survey topographic map, 1950." "Geology by W.L. Griffin, 1964-66." Includes declination diagram and location map.
- Minnesota Geological Survey, University of Minnesota :
- Held by
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