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
Repeated news accounts of the poisoning of small children and of pets by insecticides indicate that there is still a lack of information concerning the poisonous nature of these new, potent, economically valuable compounds.
Wilber, Charles G.
"New Insecticides: Toxicity, Hazards, and Therapy,"
Iowa State University Veterinarian: Vol. 23
, Article 4.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol23/iss1/4