David S. Castle Co. The Professional Building, Abilene, Texas: Area "C" Plumbing Work, item, November 10, 1952; (https://texashistory.unt.edu/ark:/67531/metapth804901/m1/1/: accessed April 21, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .