Stirl, Gus A. [Letter from Gus A. Stirl to Isaac Herbert Kempner, January 26 ,1960], letter, January 26, 1960; (https://texashistory.unt.edu/ark:/67531/metapth1198624/m1/1/: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .