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
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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