Effect of phentolamine on blood pressure, heart rate and plasma catecholamine levels in conscious, unrestricted morphine dependent rats during naloxone precipitated automatic withdrawal responses, Box: 18, Folder: 52. Personal Papers of Walter R. Dixon, PP 401. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/255593 Accessed January 03, 2025.