Miller, R. B., Sprouse, R. F., & Garner, H. E. (1991). Active immunization of cows with a Salmonella typhimurium mutant bacterin-toxoid and the passive transfer of anti-core-antigen antibodies in colostrum. The Bovine Practitioner, 1991(26), 169–171. https://doi.org/10.21423/bovine-vol1991no26p169-171