Pickle, J. J. [Letter from J. J. Pickle to John J. Herrera - 1966-02-02], letter, February 2, 1966; (https://texashistory.unt.edu/ark:/67531/metapth250793/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .