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Watts, Simeon Jefferson; Jones, David Crockett & Barton, William C.Oil Burner,
patent,
May 23, 1911;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth508743/:
accessed July 16, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting UNT Libraries Government Documents Department.