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
"Bovine Medicine & Surgery and Herd Health Management", by Gibbons, Catcott, and Smithcors. American Veterinary Publications Inc., 1970; $27.50
Sexton, Joseph W.
Iowa State University Veterinarian: Vol. 32
, Article 6.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol32/iss3/6