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Monographs of the United States Geological Survey. Volume XIX. [The Penokee Iron-bearing Series of Michigan and Wisconsin, by Roland Duer Irving and Charles Richard Van Hise.].

United States. Congress. House

出版	Verlag nicht ermittelbar, 1892
URL	http://books.google.com.hk/books?id=nF9LuwEACAAJ&hl=&source=gbs_api