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 Feb. 20, 1950, a 12 year old Boston bitch was admitted to Stange Memorial Clinic with a history of having hemorrhaged from the uterus over a period of three weeks. Upon admittance the dog showed extreme depression and a very pronounced anemia of the mucus membranes. A diagnosis of hemorrhagic metritis was made.
Holst, R. B.
"Hemorrhagic Metritis with Resulting Anemia,"
Iowa State University Veterinarian: Vol. 12
, Article 13.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss3/13