1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1913-1914.";"Surveyed in cooperation with the State of Illinois.";Coordinates (W 88⁰30’00"--W 88⁰15’00"/N 37... Geological Survey (U.S.) and State of Illinois State Geological Survey (Urbana, Ill.).
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1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1913.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and State Geological Survey (Urbana, Ill.).
1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1913.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heights.;1 ma... Geological Survey (U.S.) and State Geological Survey (Urbana, Ill.).
1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1890.";Relief shown by contours.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).
1916. Geological Survey (U.S.). Relief shown by contours, spot heights and bathymetric isolines.; Title in lower right corner: Portland and vicinity; at head of map: Topography.; ... The Survey (Washington, D.C).
1916. Geological Survey (U.S.), Graves, Henry Solon, 1871-1951, and United States. Forest Service. Cartographic Details: Scale [1:126,720]. "Henry S. Graves, forester." 66 x 56 centimeters 1:126,720 General Minnesota Maps. U.S. Dept. of Agriculture, Forest Service ; Washington, D.C.?.
1916. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1910 and 1914.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heig... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1916. Geological Survey (U.S.). Congressional districts are outlined and numbered in purple.; Insets: Mesabi Range -- St. Paul-Minneapolis and vicinity -- Duluth-Superior and vici... Dept. of the Interior (Washington, D.C).
1916. Geological Survey (U.S.). Relief shown by contours. 43 x 71 centimeters Scale 1:7,000,000 General Map Collection. The Survey (Washington, D.C).