Method of Sealing the Walls of Deep Wells Page: 1 of 4
Reference the current page of this Patent.
Method of Sealing the Walls of Deep Wells, patent, November 29, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258698/m1/1/?rotate=90: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.