Porsche Club of America. Maverick Region. The Maverick Newsletter, Volume 2, Number 7, July 1964, periodical, July 1964; (https://texashistory.unt.edu/ark:/67531/metapth848850/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .