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 Boston Terrier was admitted to Stange Memorial Clinic on Oct. 13, 1952. History revealed that approximately one month previously, the patient underwent surgery at the clinic to correct a prolapse of the rectum and that since being released, the rectum continued to prolapse at intervals of three days.
"Prolapse of the Rectum in a Dog,"
Iowa State University Veterinarian: Vol. 15
, Article 10.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol15/iss2/10