Caldwell, J. M. [Letter and Flyer: From J. M. Caldwell addressed to Comrade - August 5, 1944], letter, August 5, 1944; (https://texashistory.unt.edu/ark:/67531/metapth1398144/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .