Man Drilling, photograph, Date Unknown; (https://texashistory.unt.edu/ark:/67531/metapth49920/m1/1/: accessed May 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Man Drilling, photograph, Date Unknown; (https://texashistory.unt.edu/ark:/67531/metapth49920/m1/1/: accessed May 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .