David Oliver Cauldwell, Schizophrenia and Mental Danger Signals, B-590, 1947, id2525, Box: 4, Item: 47. Emanuel Haldeman-Julius Big Blue Books and Larger Books Collection, SC-EHJB. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/18726 Accessed June 19, 2026.