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
The formation of stony precipitates anywhere in the urinary passages is called urolithiasis. The stone is called a urolith or urinary calculus. Urolithiasis is an important disease of castrated male ruminants because of the common occurrence of urethral obstruction.
Hardisty, Jerry R. and Dillman, R. C.
"Factors Predisposing to Urolithiasis in Feedlot Cattle,"
Iowa State University Veterinarian: Vol. 33
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol33/iss2/7