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
Dr. M. S. Thorpe, of Canby, Minn., performed an autopsy on a ewe that had been dead for 14 hours, and a lamb that had died a few minutes previously.
Christensen, L. T.
"Blackleg in Sheep.,"
Iowa State University Veterinarian: Vol. 3
, Article 10.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol3/iss2/10