[Waco Water Filtering Plant], postcard, October 5, 1917; (https://texashistory.unt.edu/ark:/67531/metapth1122464/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[Waco Water Filtering Plant], postcard, October 5, 1917; (https://texashistory.unt.edu/ark:/67531/metapth1122464/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .