The Geology of Potter County by Andrew Sherwood; Report on the Coal Fields by Franklin Platt; with a colored geological map of the county, and two page plates of sections
Harrisburg, Pa. Board of Commissioners for the Second Geological Survey, 1880. Hardcover. xvi, 121, [5] p., frontispiece map of Pennsylvania, 3 folded maps in pocket inside back cover; 22 cm. Black cloth with gilt-stamped spine title: "Penna. Second Geological Survey Potter County." "Second Geological Survey of Pennsylvania: Report of Progress..... More