Improvement in Compositions Used as Building Materials.
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Improvement in Compositions Used as Building Materials., patent, October 12, 1858; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth165063/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.