New Times 16 1870-1970 - Lenin, Leninism or Social Imperialism? In Commemoration of the Centenary of the Birth of the Great Lenin, 1970, Box: 2, Folder: 31. Personal Papers of Robert A. Burton, PP 345. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/177226 Accessed September 20, 2024.