1894. 2011-05-20T20:16:03Z. 2015-10-21T14:59:37Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Kansas, Marshall County (Kan.), Riley County (Kan.), and Washington County (Kan.).
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1890. 2011-05-20T17:32:37Z. 2015-10-21T14:59:35Z. U.S. Geological Survey. English. Public. Kansas, Marshall County (Kan.), Nemaha County (Kan.), and Pottawatomie County (Kan.).