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 first calf Brown Swiss heifer was admitted to the Stange Memorial Clinic the afternoon of Jan. 12, 1950. Delivery of an abnormally large calf had been attempted in the field.
"Obturator Paralysis following Dystocia,"
Iowa State University Veterinarian: Vol. 12
, Article 14.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss3/14