"Prepared with the cooperation of the Geological Survey of Wyoming and the Dept. of Geology, University of Wyoming."
"Contour interval 20 feet."
"Base by U.S. Geological Survey, 1953."
"Geology by Laura W. McGrew, assisted by Marjorie E. MacLachlan, 1958, and Toni Dana Dunrud, 1960."
Relief shown by contours and spot heights.