[Concourse Area of Chicago Union Station], photograph, May 16, 1969; (https://texashistory.unt.edu/ark:/67531/metapth28735/m1/1/: accessed June 7, 2023), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
[Concourse Area of Chicago Union Station], photograph, May 16, 1969; (https://texashistory.unt.edu/ark:/67531/metapth28735/m1/1/: accessed June 7, 2023), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .