McFarland, Milton R. [Letter from Milton R. McFarland to Cornelia Yerkes Kafka, July 30, 1979], letter, July 30, 1979; (https://texashistory.unt.edu/ark:/67531/metapth1297105/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .