Sept. 1936, Relief shown by hachures and spot heights., Oriented with north to the left, Showing oil& gas fields, land net, state land, primary & secondary roads, drainage, other features., W.P.A. project no. 109., Base from S.E.R.A. project map, August 1, 1936.
Published in cooperation with the Department of Earth Sciences, Iowa State University of Science ..., Cartography by Fred H. Porter., Relief shown by contours and spot heights, Contour interval 40 feet.
Published in cooperation with the Department of Earth Sciences, Iowa State University of Science ..., Cartography by Fred H. Porter., Relief shown by contours and spot heights., Contour interval 20 feet.
Published in cooperation with the Department of Earth Sciences, Iowa State University of Science ..., Relief shown by contour lines and spot heights., Includes quadrangle location map.
Published in cooperation with the Department of Earth Sciences, Iowa State University of Science ..., Relief shown by contour lines and spot heights., Includes quadrangle location map.
