Beegle, J. Allan, and Donald Halsted. Michigan's Changing Population. East Lansing, MI: Michigan State Universtiy Agricultural Experiment Station, 1957

Beegle, J. Allan, and Donald Halsted. Michigan's Changing Population. East Lansing, MI: Michigan State Universtiy Agricultural Experiment Station, 1957, Box: 155, Folder: 3. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/388655 Accessed September 27, 2026.