Geological Section from the Rio Grande to the Red River, 1855-1861
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Geological Section from the Rio Grande to the Red River, 1855-1861, map, 1861; Washington, D.C.. (texashistory.unt.edu/ark:/67531/metapth41378/: accessed May 20, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting University of Texas at Arlington Library.