1947. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey, 1945.";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).
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1947. Geological Survey (U.S.). Mapped by the Geological Survey, 1944;Contour interval 10 feet.";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).
1947. Geological Survey (U.S.). 1 map, colored;Contour interval 20 feet.;"Landmark buildings only shown in the city of Vandalia.";"Mapped by the Geological Survey 1945";Relief sho... Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).
1947. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey 1945";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).
1947. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey 1945";Relief shown by contours and spot heights.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).
1947. Geological Survey (U.S.). Contour interval 20 feet.;"Mapped by the Geological Survey 1945";Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500. Geological Survey (U.S.)|Geological Survey Division (Urbana, Ill.).