High Plains Underground Water Conservation District No. 1 (Tex.). The Cross Section, Volume 21, Number 1, January 1975, periodical, January 1975; (https://texashistory.unt.edu/ark:/67531/metapth1532998/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .