Porsche Club of America. Maverick Region. Slipstream, Volume 23, Number 4, April 1985, periodical, April 1985; (https://texashistory.unt.edu/ark:/67531/metapth901538/m1/1/: accessed July 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .

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