[Letter from Cornelia Yerkes and Phil Kafka to Frances Yerkes, October 27, 1949], letter, October 27, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1296654/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .