McCarter, R. William. [Letter from R. William McCarter to Alisha Slough, May 7, 1990], letter, May 7, 1990; (https://texashistory.unt.edu/ark:/67531/metadc1824433/m1/1/: accessed July 9, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .