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
Frequently, the practicing veterinarian is asked questions concerning the feeding of urea. The following is a brief review of urea feeding recommendations for ruminants.
"Urea Feeding Recommendations for Ruminants,"
Iowa State University Veterinarian: Vol. 21
, Article 6.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol21/iss2/6