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Strategic Minerals Investigations in Marquette and Baraga Counties, 1943

Alfred Kitchener SnelgroveWyllys Arthur SeamanVincent L. Ayres

出版	State of Michigan, Department of Conservation, Geological Survey Division, 1944
URL	http://books.google.com.hk/books?id=_2nhAAAAMAAJ&hl=&source=gbs_api