High Plains Underground Water Conservation District No. 1 (Tex.). The Cross Section, Volume 16, Number 9, September 1970, periodical, September 1970; (https://texashistory.unt.edu/ark:/67531/metapth1532946/m1/1/: accessed June 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .