Anderson, K. L., B. T. McDaniel, U. Nathan, T. V. Johnson, and J. Rehman. 1991. “Influence of Bovine Somatotropin on Subclinical and Clinical Mastitis”. The Bovine Practitioner 1991 (26):73-76. https://doi.org/10.21423/bovine-vol1991no26p73-76.