2006. Sen, Colleen. Relief shown by shading. LNG trade routes are indicated. "December 2006." Includes graphs showing: "Global LNG trade." Tables of economic statistic... Houston, Tex. : Oil & Gas Journal, 2006.
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2003. Petroleum Economist Ltd. Deutsche Bank Relief shown by gradient tints. Depths shown by gradient tints.On upper left corner: Petroleum Economist Car... London : Petroleum Economist Ltd., 2003.
1984. Oilfield Publications Limited Oilfields and gasfields located; oil and gas pipelines, both existing and proposed, located. Ledbury, England ; Houston, Tex. : Oilfield Publications Limited, 1984.