Carll, John Franklin The Geology Of The Oil Regions Of Warren, Venango, Clarion, And Butler Counties: Including Surveys Of The Garland And Panama Conglomerates In Warren ... Of Oil Well Rigs And Tools, And A Discussion

Carll, John Franklin The Geology Of The Oil Regions Of Warren, Venango, Clarion, And Butler Counties: Including Surveys Of The Garland And Panama Conglomerates In Warren ... Of Oil Well Rigs And Tools, And A Discussion

Carll, John F. Report of Progress in the Venango County District

Carll, John Franklin Oil Well Records And Levels