[Statement of Account for John J. Herrera from John Barron Consulting Radio Engineers - May 28, 1947], text, May 28, 1947; (https://texashistory.unt.edu/ark:/67531/metapth249401/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .