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 Oct. 3, 1950, a fifteen-month-old Hereford steer was admited to Stange Memorial Clinic with a history of having failed to respond to treatments for constipation.
"Internal Intestinal Strangulation in a Steer,"
Iowa State University Veterinarian: Vol. 13
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol13/iss1/13