"Contour interval 100 feet." Relief shown by contours and spot heights. "Compiled in 1955 by photogrammetric methods and from United States Quadrangles, 1:62,500, USGS, 1939-51. Planimetric detail revised by photo-planimetric methods. Horizontal and vertical control by USGS, USC&GS and USCE. Photography field annotated 1955. Limited revision by U.S. Geological Survey 1964." "100,000-foot grids based on Oklahoma coordinate system, north and south zones." Includes magnetic declination information, sectionalized township diagram, and location and reliability diagrams. "35098-A1-TF-250." Includes Ellis, Dewey, Blaine, Kingfisher, Roger Mills, Custer, Canadian, Beckham, Washita, Caddo, Grady, Harmon, Greer, and Kiowa counties.