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.
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2002. Petroleum Economist Ltd. Saudi Aramco. Relief shown by gradient tints. Depths shown by gradient tints. On upper left corner: Petroleum Economist Ca... London : Petroleum Economist Ltd., 2002.