[Rockefeller's Event Calendar: May 1987], pamphlet, April 1987; (https://texashistory.unt.edu/ark:/67531/metapth1544931/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[Rockefeller's Event Calendar: May 1987], pamphlet, April 1987; (https://texashistory.unt.edu/ark:/67531/metapth1544931/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .