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【作者(必填)】Ronald G. Cummings
【文题(必填)】some extensions of the economic theory of exhaustible resources
【年份(必填)】Volume 7, Issue 3, pages 201–210, September 1969
【全文链接或数据库名称(选填)】http://onlinelibrary.wiley.com/doi/10.1111/j.1465-7295.1969.tb01480.x/abstract