Motives of West Russian Nobles in Deserting Lithuania for Moscow, 1377-1514 by Oswald P. Backus, 1957, Box: 20, Folder: 17. Personal Papers of George F. Jenks, PP 474. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/136556 Accessed May 18, 2024.