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
Selective breeding for resistance to disease has been suggested as a method of disease control in animals. In recent years, amazing work has been done in the plant field in developing plants that are resistant to many of the diseases that once were considered fatal to the plants' life. Comparatively little work has been done in the animal field along these lines.
Maddy, K. T.
"Heredity As A Disease Control,"
Iowa State University Veterinarian: Vol. 7
, Article 4.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol7/iss2/4