Brick-Mason's Steel Trig., patent, December 9, 1913; (https://texashistory.unt.edu/ark:/67531/metapth858716/m1/1/: accessed June 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Brick-Mason's Steel Trig., patent, December 9, 1913; (https://texashistory.unt.edu/ark:/67531/metapth858716/m1/1/: accessed June 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .