Irwin, Miriam Owen. [Letter from Miriam Irwin to Kathryn Rickard, April 12, 1988], letter, April 12, 1988; (https://texashistory.unt.edu/ark:/67531/metadc1151788/m1/1/: accessed April 19, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .