[Letter from W. F. Ohlemeyer to Dave Duclos, April 21, 1988], letter, April 21, 1988; (https://texashistory.unt.edu/ark:/67531/metapth1011433/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .