Hydrostatic Control for Pumps, patent, January 7, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1257353/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Hydrostatic Control for Pumps, patent, January 7, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1257353/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .