The geology of the oil regions of Warren, Venango, Clarion, and Butler Counties : including surveys of the Garland and Panama Conglomerates in Warren and Crawford, and in Chautauqua Co., N.Y., descriptions of oil well rig and tools, and a discussion of the preglacial and postglacial drainage of the Lake Erie country
Carll, John F. (John Franklin), 1828-1904, author