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 yearling Quarter Horse filly was presented for a mild lameness of the right hind leg of three months duration. Physical examination revealed no areas of soft tissue swelling but a mild increase in lameness with stifle joint flexion.
Dyer, Neil and Riedesel, E. A.
"What is Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 49
, Article 11.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol49/iss2/11