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Geology of Lake McConaughy Area, Keith County, Nebraska
Roger K. PabianRobert Francis Diffendal
出版Conservation and Survey Division, Institute of Agriculture and Natural Resources, University of Nebraska, 1981
ISBN15616106669781561610662
URLhttp://books.google.com.hk/books?id=LjzD2gYDj6kC&hl=&source=gbs_api