12. "Effect of naloxone on blood pressure responses and plasma catecholamine levels following clonidine injection in conscious, unrestrained rats" by Andi Piang-Ling Chang, M. Dillard and W. R. Dixon

12. "Effect of naloxone on blood pressure responses and plasma catecholamine levels following clonidine injection in conscious, unrestrained rats" by Andi Piang-Ling Chang, M. Dillard and W. R. Dixon, Box: 17, Folder: 13. Personal Papers of Walter R. Dixon, PP 401. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/255556 Accessed December 25, 2025.