Mold for Casting the Hulls of Concrete Ships.
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Mold for Casting the Hulls of Concrete Ships., patent, June 28, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258644/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.