[Rockefeller's Event Calendar: June 1987], pamphlet, May 1987; (https://texashistory.unt.edu/ark:/67531/metapth1544932/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[Rockefeller's Event Calendar: June 1987], pamphlet, May 1987; (https://texashistory.unt.edu/ark:/67531/metapth1544932/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .