O’Brien, Jim. American Leninism in the 1970s. Massachusetts: New England Free Press, 1978

O’Brien, Jim. American Leninism in the 1970s. Massachusetts: New England Free Press, 1978, Box: 10, Volume: 42. Midwest Distributors records, RH MS 949. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/574532 Accessed March 06, 2026.