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
A five day old Guernsey calf was brought to the Iowa State Veterinary Diagnostic Laboratory for post mortem examination with a history of no apparent illness prior to death.
"Perforated Ulcers in a Young Calf,"
Iowa State University Veterinarian: Vol. 25
, Article 6.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol25/iss2/6