Rivera-Anaya, José D., and Carlos M. Berrocal. “Evaluation of ‘Valsyn-Gel’ in The Treatment of Chronic, Subclinical Mastitis”. The Journal of Agriculture of the University of Puerto Rico 47, no. 3 (July 1, 1963): 180–185. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12950.