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 spayed female domestic short-haired cat was adopted from the Humane Society at 18 months of age. During the next eleven months she experienced three episodes of hematuria. The first two episodes were responsive to antibiotic therapy. During the third recurrence, radiographs were obtained to rule out the presence of cystic calculi.
Larsen, Arden E.
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 56
, Article 14.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol56/iss2/14