Herrera, John J. [Letter from John J. Herrera to Rudy M. Briones - 1950-09-21], letter, September 21, 1950; (https://texashistory.unt.edu/ark:/67531/metapth250093/m1/1/: accessed September 22, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .