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Oil and Gas Developments in Pennsylvania in 1989
John A. HarperCheryl L. Cozart
出版Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geological Survey, 1990
ISBN081820141X9780818201417
URLhttp://books.google.com.hk/books?id=9GSCyIon1XIC&hl=&source=gbs_api