Tandy Corporation. Radio Shack Division.Intercom, Volume 4, Number 9, March 1971,
periodical,
March 1971;
Fort Worth, Texas.
(https://texashistory.unt.edu/ark:/67531/metadc1764305/m1/1/:
accessed July 16, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting UNT Libraries Special Collections.