Works Cited Inc, History Globe. "The Oregon Trail: 1843 Map." The Oregon Trail: 1843 Map. History Globe, June-July 2016. Web. 02 Feb. 2016. Underwater, Todd S. "Oregon Trail History." Oregon Trail History. Todd Underewood, Oct.-Nov. 2000. Web. 02 Feb. 2016. United States. National Park Service, National Park. "Maps." National Parks Service. U.S. Department of the Interior, 26 Jan. 2016. Web. 02 Feb. 2016. "U.S. DEPARTMENT OF THE INTERIOR." Basic Facts About the Oregon Trail Oregon/Washington BLM. Ed. National Historic Oregon. Land Management, 2 Nov. 2007. Web. 02 Feb. 2016.
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