High Plains Underground Water Conservation District No. 1 (Tex.). The Cross Section, Volume 16, Number 7, July 1970, periodical, July 1970; (https://texashistory.unt.edu/ark:/67531/metapth1532944/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .