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
The patient was a nine year old mixed breed bitch. She has had a previous history of pseudocyesis following each estrus. The owner had noticed intermittent episodes of vomiting and bloody diarrhea for the last three or four weeks.
Hoskins, J. D.
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 34
, Article 14.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol34/iss1/14