Morga, Eduardo.[Letter from Eduardo Morga to John J. Herrera - 1977-05-02],
letter,
Date Unknown;
(https://texashistory.unt.edu/ark:/67531/metapth251101/m1/1/:
accessed April 25, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting Hoston History Research Center at Houston Public Library.