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
Omega Tau Sigma, Iowa State University's professional veterinary fraternity started in the 1970 academic year by pledging 15 new members from the freshman class.
Iowa State University Veterinarian
"Omega Tau Sigma,"
Iowa State University Veterinarian: Vol. 32
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol32/iss3/5