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Abandoned Underground Coal Mines of Des Moines, Iowa, and Vicinity

Mary R. Howes

出版	Energy and Geological Resources Division, Geological Survey Bureau, 1989
URL	http://books.google.com.hk/books?id=YQ50QuS4PJUC&hl=&source=gbs_api

註釋

Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and the U.S. Department of Interior, Office of Mining and Land Reclamation provided financial support for the research which is presented in this report.