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Date: 2010-07-26 14:42:13Missouri River Lewis and Clark Expedition Niobrara State Park Niobrara River Missouri National Recreational River Spirit Mound Historic Prairie Niobrara Yankton South Dakota Seaman Geography of the United States Nebraska Geography of South Dakota | Missouri River National Park Service U.S. Department of the Interior Missouri National Recreational RiverAdd to Reading ListSource URL: www.nps.govDownload Document from Source WebsiteFile Size: 1,06 MBShare Document on Facebook |