Map of Dearborn, Ohio, and Switzerland Counties, Indiana
Shows cities and towns, railroads, geological features, mines and mineral resources. Originally included with three other maps in folder: Maps for Geological Survey of Indiana, 1872, E.T. Cox. Scale approximately 1:130,000. Drawn for the 3d and 4th annual reports of Prof. E.T. Cox, State Geologist, by Robert B. Warder, 1872.
Cox, E. T. (Edward Travers), 1821-1907 and Warder, Robert B. (Robert Bowne),1848-1905