Improvement in Recording Instruments for Locomotives
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Improvement in Recording Instruments for Locomotives, patent, September 26, 1873; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166849/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.