Scale approximately 1:510,000. "This map is a revision of the 1968 publication ..." Includes directory of oil pipe line companies and index to gas pipe line companies. "Ohio coordinate system 100,000-foot grid lines from U.S. Coast and Geodetic Survey data." Shows gas and liquid petroleum storage areas, points of distribution, compressor stations, refineries, pumping stations, propane plants, and major control points. Compiled by Harold J. Flint. Cartographic drafting by James E. Hairston. "Base map by United States Dept. of the Interior, Geological Survey."
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