Improvement in Gas-Liquefying Pumps.
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Improvement in Gas-Liquefying Pumps., patent, March 21, 1876; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166530/: accessed June 10, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.