Travel Files; Cooperativo Sobre la Apifauna Mexicana Program (PCAM) Files; International Union for the Study of Social Insects (IUSSI) Files, Box: 1. Personal papers of Charles D. Michener, PP 450. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/265763 Accessed May 18, 2024.