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 Jan. 4th, 1951 a 12-year-old Hereford cow was admitted to Stange Memorial Clinic with a history of having had what was thought to be infectious keratitis of the right eye. The condition was not treated and became infested with screw-worms. The animal was gradually becoming emaciated.
Hinkley, C. D.
"Metastatic Squamous Cell Carcinoma in a Hereford Cow,"
Iowa State University Veterinarian: Vol. 13
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol13/iss3/13