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 4-year-old female dog of mixed breed was admitted to the Stange Memorial Clinic on Nov. 4, 1949, with a history of difficult respiration over the past three years. Although the patient manifested alertness and good spirits, she panted rapidly after very slight exercise. Previous examinations and x-ray examinations had been used to make a diagnosis of diaphragmatic hernia.
"Diaphragmatic Herniorrhaphy in a Dog,"
Iowa State University Veterinarian: Vol. 12
, Article 8.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss2/8