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
There is a growing appreciation of the importance of hypersensitiveness in animals. Compared to the incidence of allergies in human beings, animal allergy is relatively common.
Wittich, F. W.
Iowa State University Veterinarian: Vol. 13
, Article 4.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol13/iss3/4