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Google圖書搜尋
Oil and Gas Developments in Pennsylvania in 1974
William S. Lytle
出版
Commonwealth of Pennsylvania, Department of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey
, 1975
URL
http://books.google.com.hk/books?id=5e5IAQAAMAAJ&hl=&source=gbs_api