- Geological Survey (U.S.)
- University of Illinois at Urbana-Champaign, University Library
Relief shown by contours.; "Surveyed in 1911 and 1913."; "Surveyed in cooperation with the States of Missouri and Illinois."; "Contour interval 20 feet. 45 x 36 cm.; 1 map, colored. 1:62,500. Geological Survey (U.S.); Bureau of Geology and Mines (Rolla, Mo.); Geological Survey Division (Urbana, Ill.).