Process of Preparing and Tempering Slurry for Portland Cement.
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Process of Preparing and Tempering Slurry for Portland Cement., patent, September 29, 1891; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth172801/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.