The geology of Lycoming and Sullivan Counties - Sherwood, Andrew -1933; Platt, Franklin 1844-1900 (Board of Commissioners for the Second Geological Survey of Pennsylvania, 1880)
Rückentitel: Lycoming and Sullivan. - Kartenbeilagen: Little Pine Creek coal basin (2 Blätter); Lycoming County (1 Blatt); Sullivan County (1 Blatt)