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 May 27, 1955 an 8-year-old Angus cow was admitted to Stange Clinic as a "hardware suspect." The only history available at the time was that the animal had been treated for pneumonia about one month previously.
"Empyema in the Bovine,"
Iowa State University Veterinarian: Vol. 18
, Article 8.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol18/iss1/8