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 the evening of January 9, 1962, a young domestic feline was admitted to the Stange Memorial Clinic. The history offered was that the patient had been very irritable and had convulsed the previous evening. Prior to the sudden onset of symptoms the animal was apparently normal.
Ledet, Arlo E.
"An Esophageal Foreign Body in a Cat,"
Iowa State University Veterinarian: Vol. 24
, Article 8.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol24/iss2/8