[Letter from Robert A. Vineyard to I. H. Kempner, November 12, 1962], letter, November 12, 1962; (https://texashistory.unt.edu/ark:/67531/metapth1508879/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .