Hardy, Ray. [Affidavit and Certificate, American Express vs. LULAC - 1977-06-22], Legal Document, June 22, 1977; digital images, (http://texashistory.unt.edu/ark:/67531/metapth251558/ : accessed August 20, 2014), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting Houston Metropolitan Research Center at Houston Public Library, Houston, Texas.
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