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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 and Crawford, and in Chautauqua Co., N. Y., descriptions of oil well rig and tools, and a discussion is an unchanged, high-quality... Read Full Overview

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This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely... Read Full Overview