Texas. Legislature. House of Representatives. 82nd Texas Legislature, Regular Session, House Bill 1840, Chapter 991, Legislative Document, June 17, 2011; (http://texashistory.unt.edu/ark:/67531/metapth311124/ : accessed April 01, 2015), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting UNT Libraries Government Documents Department, Denton, Texas.
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