U.S. Fish and Wildlife Service. Draft Environmental Impact Statement: Edwards Aquifer Recovery Implementation Program, Habitat Conservation Plan, Final Report, Volume 2, report, June 2012; (https://texashistory.unt.edu/ark:/67531/metapth654018/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .