Improvements in Traction-Engines.
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Improvements in Traction-Engines., patent, October 14, 1879; Washington D.C.. (https://texashistory.unt.edu/ark:/67531/metapth169908/: accessed May 16, 2022), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.