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 March 13, 1950, a Hereford cow, age six years, was referred to Stange Memorial Clinic. The history accompanying this cow was that she had a prolapse of the vagina and was due to calf in about two months. The general condition was good.
Jensen, Loyd A.
"A Macerated Fetus in a Bovine,"
Iowa State University Veterinarian: Vol. 12
, Article 12.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss3/12