High Plains Underground Water Conservation District No. 1 (Tex.). The Cross Section, Volume 16, Number 5, May 1970, periodical, May 1970; (https://texashistory.unt.edu/ark:/67531/metapth1532942/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .