Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
On Aug. 1, 1952, a three-year-old Angus bull was admitted to Stange Memorial Clinic showing an enlarged and somewhat hardened scrotum. Inguinal hernia was the diagnosis. A 48-hour fasting period was begun immediately in preparation for surgery.
"Inguinal Hernia in the Bull,"
Iowa State University Veterinarian: Vol. 15
, Article 13.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol15/iss3/13