1972. Gray, Henry Hamilton,1922-cartographer., Forsyth, Jane L. (Jane Louise),1921-cartographer., Schneider, Allan F. (Allan Frank),1926-cartographer., and Gooding, Ansel Miller. Base map modified from Army Map Service, Map NJ 16-3, 1964.' Includes text, cross section, columnar section, diagram, schematic section, ancillary ... Indiana Geological Survey.
1872. Walling, Henry Francis, 1825-1888., Gray, O. W. (Ormando Wyllis), 1829-1912., Stedman, Brown & Lyon., David Rumsey Collection., and Cartography Associates. 1 map : hand col. ; 36 x 26 cm. Includes "Section through northern Ohio," "Section from Cincinnati to Marietta," and explanation of colors.