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Finley, Robert Lee & Harper, Henry Hughes.Car-Coupling,
patent,
February 11, 1890;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth172293/:
accessed July 17, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting UNT Libraries Government Documents Department.