Digest (4 folders); Digest 2.; Evolve; Extremism (2 folders) and Economics 1 (8 folders), Box: 49. Edward M. Greb personal library on government, politics, economics, and history, RH WL MS 29. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/51755 Accessed April 20, 2025.