"Where the Famous Crystals Are Made", photograph, 1905?; (https://texashistory.unt.edu/ark:/67531/metapth24961/m1/1/: accessed June 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
"Where the Famous Crystals Are Made", photograph, 1905?; (https://texashistory.unt.edu/ark:/67531/metapth24961/m1/1/: accessed June 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .