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. 15, 1954, a Hereford cow was admitted to Stange Memorial Clinic at Iowa State College. The diagnosis was a carcinoma of the right eyeball, which was to be removed. The operation was scheduled for the next day.
"Enucleation of the Eye,"
Iowa State University Veterinarian: Vol. 16
, Article 6.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol16/iss3/6