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![]() Date: 2010-12-07 20:14:17Geological Exploration of the Fortieth Parallel Geology California Geological Survey Josiah Whitney History of North America Ferdinand Vandeveer Hayden United States Samuel Franklin Emmons Alfred Hulse Brooks Clarence King Sierra Nevada Geological surveys | Source URL: gsahist.orgDownload Document from Source WebsiteFile Size: 228,16 KBShare Document on Facebook |