[1]
S. M. Cleveland, M. A. Cleveland, M. D. Salman, R. G. Mortimer, and H. Van Campen, “Case Study: Removal of bovine viral diarrhea virus (BVDV) persistently infected (PI) animals from a United States beef herd: Effect on PI animal prevalence and BVDV seroprevalence. Case Study”, Bov. pract., vol. 38, no. 2, pp. 155–160, Jun. 2004.