High Plains Underground Water Conservation District No. 1 (Tex.). The Cross Section, Volume 15, Number 15, August 1969, periodical, August 1969; (https://texashistory.unt.edu/ark:/67531/metapth1532933/m1/1/: accessed May 31, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .