Miller, R. B., R. F. Sprouse, and H. E. Garner. 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):169-71. https://doi.org/10.21423/bovine-vol1991no26p169-171.