Main Injecting Valves Operating Gears [Sheet 1 of 2]
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Main Injecting Valves Operating Gears [Sheet 1 of 2], technical drawing, July 8, 1926; (https://texashistory.unt.edu/ark:/67531/metapth1141591/: accessed June 5, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting Texas Parks & Wildlife Department.