Well-Drilling Apparatus. Page: 2 of 6
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Well-Drilling Apparatus., patent, February 18, 1896; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth174223/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.