[Letter from Galveston Art Tile Company to Isaac H. Kempner, March 21, 1957], letter, March 21, 1957; (https://texashistory.unt.edu/ark:/67531/metapth1513063/m1/1/: accessed July 9, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .