Texas Planning Council for Developmental Disabilities. Highlights, Volume 9, Number 2, May/June 1991, periodical, May 1991; (https://texashistory.unt.edu/ark:/67531/metapth903240/m1/1/: accessed June 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .

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