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
Studies conducted at Iowa State College during the past 10 months show that a fatal disease can be produced in cattle when fed certain batches of commercially prepared trichloroethylene-extracted soybean meal.
Picken, J. C. Jr.; Biester, H. E.; and Covault, C. H.
"Trichloroethylene Extracted Soybean Oil Meal Poisoning,"
Iowa State University Veterinarian: Vol. 14
, Article 2.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol14/iss3/2