"Electrical Brain Stimulation and LSD-Type Drugs: A Study Document Prepared for The National Council of the Churches of Christ," by Sanford Unger, Conference on Church Renewal, MSP00069_9a715912d1c6a10a5b48af9804568679. Purdue University Archives and Special Collections. https://archivesdev.lib.purdue.edu/repositories/2/digital_objects/25 Accessed May 03, 2024.