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 March 24, 1943, a one and one-half year old Cairn Terrior was presented to the Stange Memorial Clinic. The history presented with the patient was that the dog had been vomiting, was not eating, and had a diarrhea. The dog had been sick for a couple of days. It was' reported that the dog had had canine distemper when a pup.
"Black Tongue in a Dog,"
Iowa State University Veterinarian: Vol. 5
, Article 9.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol5/iss4/9