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 March 7, 1950, the office of the ambulatory clinic was called to treat a Holstein-Friesian heifer which had considerable swelling and redness about the eyes.
Randolph, K. and Pfow, C.
"Lymphocytoma in a Cow,"
Iowa State University Veterinarian: Vol. 12
, Article 17.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss3/17