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
Such a significant number of quittor cases have entered the veterinary clinic at Iowa State College in the past year that a short dissertation of this condition is warranted.
Reinhart, V. M.
Iowa State University Veterinarian: Vol. 6
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol6/iss4/5