Medina, Rita, Anne D. Frame, Pedro Bendezú, Angel Pérez, and Alfredo Narváez. “THE EFFECT OF CLORSULON ON LEVELS OF FOUR INORGANIC ELEMENTS IN MILK”. The Journal of Agriculture of the University of Puerto Rico 74, no. 3 (July 1, 1990): 327–329. Accessed August 11, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/6668.