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A Geological Reconnaissance Across the Cascade Range Near the Forty-ninth Parallel,

George Otis SmithFrank C. Calkins

出版	U.S. Government Printing Office, 1904
URL	http://books.google.com.hk/books?id=PqcPAAAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN