Texas. Division of Emergency Management.Division of Emergency Management Digest, Volume 33, Number 5, October-December 1987,
periodical,
October 1987;
Austin, Texas.
(https://texashistory.unt.edu/ark:/67531/metapth1033208/m1/8/:
accessed July 16, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting UNT Libraries Government Documents Department.