[First Regiment of Artillery, Company E], postcard, [1910..1920]; (https://texashistory.unt.edu/ark:/67531/metapth187748/m1/1/: accessed July 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[First Regiment of Artillery, Company E], postcard, [1910..1920]; (https://texashistory.unt.edu/ark:/67531/metapth187748/m1/1/: accessed July 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .