[Postcard of Treadwell Mines in Alaska], postcard, 19uu; (https://texashistory.unt.edu/ark:/67531/metapth702888/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[Postcard of Treadwell Mines in Alaska], postcard, 19uu; (https://texashistory.unt.edu/ark:/67531/metapth702888/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .