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 May 11, 1973 a nine-year-old male Chesapeake Bay Retriever was admitted to the Stange Memorial clinic as a referral case with a tentative diagnosis of a diaphragmatic hernia.
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 36
, Article 4.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol36/iss1/4