(W 92⁰30'00"--W 92⁰22'30"/N 37⁰37'30"--N 37⁰30'00").
Relief shown by spot heights and contour interval of 10 ft.
"Modifications to USGS base map by the Geometronics Service Center from 1978 aerial photography and 1978 correction guides furnished by the Eastern Region."
"Base map prepared by the Army Map Service."
"Published for civil use by the Geological Survey."
Includes "Quadrangle location diagram" for Rolla-Houston Ranger Districts, Mark Twain National Forest.