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 six-month old Hereford bull was brought to the Stange Memorial Clinic on February 2, 1943. The history revealed that the animal had started to limp on its left front foot about two weeks previous and that this symptom had progressively increased until the animal refused to place any weight on the leg.
"Foot-Rot in Cattle,"
Iowa State University Veterinarian: Vol. 5
, Article 12.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol5/iss3/12