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
While on an interview trip to western Montana, we were told of a serious threat to the cow-calf operations there. Doctor Jack Ward of Hamilton, Montana, believes that he has observed a weak-calf syndrom in the Bitterroot Valley for the last four or five years that resembles the epizootic bovine abortion reported from California and the intermountain area.
Hamm, Ronald; Hammill, Doug; and Pisarik, Frank
"Epizootic Bovine Abortion in Montana?,"
Iowa State University Veterinarian: Vol. 31
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol31/iss2/7