Christie, G. J., T. J. Keefe, and B. W. Strom. “Hetacillin, a New Approach to Mastitis Control”. The Bovine Practitioner 1973, no. 8 (November 1, 1973): 50–52. Accessed June 27, 2024. https://bovine-ojs-tamu.tdl.org/bovine/article/view/1825.