Throop, Orramel Hinckley, b. 1798. Lay's map of the United States [Sheet 3]., Map, 1832; digital images, (http://texashistory.unt.edu/ark:/67531/metapth298403/ : accessed July 13, 2014), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting University of Texas at Arlington Library, Arlington, Texas.
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