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 case of recurrent cystic calculi was brought to the Stange Memorial Clinic on July 19, 1943. The patient, a 9-year-old female Scottish Terrier, had 53 small bladder stones removed surgically at the clinic 3 years prior to her readmittance. Diagnosis of the condition was made from the history of previous lithiasis, frequent micturition with hematuria, and by abdominal palpation.
Norton, R. E.
"Cystic Calculi in a Bitch,"
Iowa State University Veterinarian: Vol. 6
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol6/iss1/13