Camera Attachment, patent, May 20, 1913; (https://texashistory.unt.edu/ark:/67531/metapth853670/m1/4/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Camera Attachment, patent, May 20, 1913; (https://texashistory.unt.edu/ark:/67531/metapth853670/m1/4/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .