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 two-year-old Suffolk ram with clinical signs of scrapie was admitted to the Iowa State Veterinary Clinic on August 19, 1964. The ram came from a flock of Suffolk sheep on a farm near Clemons, Iowa. He had been purchased from the Iowa Falls area.
Schilling, James R.
Iowa State University Veterinarian: Vol. 27
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol27/iss1/7