Foundations for Electrical Equipment in Aft Gyro Room on 2nd Platform, Frs 85 - 89, item, September 27, 1944; (https://texashistory.unt.edu/ark:/67531/metapth887348/m1/1/: accessed November 21, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .