Esenwein, August C.Convair Supervisory Newsletter, Number 102, July 22, 1953,
periodical,
July 22, 1953;
Fort Worth, Texas.
(https://texashistory.unt.edu/ark:/67531/metapth1149738/m1/2/:
accessed July 17, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting Lockheed Martin Aeronautics Company, Fort Worth.