[Letter from Daniel W. Kempner to Griffing Nurseries, April 5, 1948], letter, April 5, 1948; (https://texashistory.unt.edu/ark:/67531/metapth1340151/m1/1/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .