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
Helminths, Arthropods and Protozoa of Domesticated Animals. 6th ed. of Manning's Veterinary Helminthology and Entomology. by E. J. L. Soulsby XIX + 824 pp.
Kemp, Russell L.
Iowa State University Veterinarian: Vol. 31
, Article 14.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol31/iss2/14