Trees, Clyde C. [Letter from Clyde C. Trees to I. H. Kempner, June 1, 1948], letter, June 1, 1948; (https://texashistory.unt.edu/ark:/67531/metapth1447196/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .