1923. Geological Survey (U.S.). Contour interval 10 feet.;"Surveyed in 1919-1920.";"Surveyed in cooperation with the States of Illinois and Wisconsin.";Relief shown by contours an... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Geological and Natural History Survey (Madison, Wis.).
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1923. Rand McNally and Company. 77 x 63 centimeters Scale approximately 1:825,000. General Minnesota Maps. Rand McNally & Co., (United States).
1923. Ink and pencil on paper.; Relief shown by contours and rock drawings.; Shows trails, campgrounds, springs, railroads, and roads.; "Contour interval...
1923. Rand McNally and Company. Also shows steamship lines sailing from Wisconsin ports, Duluth, Minn., and Chicago.; Title from cover of accompanying index.; Includes index to pr... Rand McNally (Chicago, Ill), 1923.