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. 25, 1947, a 4-year old Holstein cow in fair condition was admitted to Stange Memorial Clinic. No definite history could be obtained at the time. The patient was brought to the clinic by a trucker who could give no history. A lacerated wound was present on the left front quarter of the udder, extending into the teat sinus on the anterior medial side of the teat. The left rear and left front quarters of the udder were considerably enlarged and swollen. It was immediately decided to use surgical methods in the treatment of the lacerated teat.
"Lacerated Teat and Mastitis in a Bovine,"
Iowa State University Veterinarian: Vol. 10
, Article 11.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol10/iss1/11