Pulley Hub., patent, October 14, 1890; (https://texashistory.unt.edu/ark:/67531/metapth172496/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Pulley Hub., patent, October 14, 1890; (https://texashistory.unt.edu/ark:/67531/metapth172496/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .