Oil Workers International Union. [Notice of meeting at J Santana's Recreational Club - 1947-12-04], poster, December 4, 1947; (https://texashistory.unt.edu/ark:/67531/metapth248920/m1/1/: accessed May 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .