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 Feb. 23, 1944, a 20-month-old steer entered the Stange Memorial Clinic with a history of anorexia, loss of weight, and alternate periods of constipation and diarrhea. The condition had existed in the steer for 5 weeks, and it was the only animal so affected in a herd of feedlot steers.
Jorgensen, J. P.
"Prehaptic Abscess of a Steer,"
Iowa State University Veterinarian: Vol. 6
, Article 14.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol6/iss4/14