Steel Form for Laying Concrete Page: 2 of 4
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Steel Form for Laying Concrete, patent, October 24, 1916; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth859995/m1/2/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.