Geology of the Oil Regions of Warren, Venango, Clarion, and

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 Dis... » 

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 «