Wilson, S. K., A. A. Kocan, E. T. Gaudy, and D. Goodwin. “The Prevalence of Trichomoniasis in Oklahoma Beef Bulls”. The Bovine Practitioner, vol. 1979, no. 14, Nov. 1979, pp. 109-10, doi:10.21423/bovine-vol1979no14p109-110.