Roof-Jack, patent, February 25, 1913; (https://texashistory.unt.edu/ark:/67531/metapth511174/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Roof-Jack, patent, February 25, 1913; (https://texashistory.unt.edu/ark:/67531/metapth511174/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .