Ruiz, Teodoro M., Benjamin Rivera, and Norma Corchado. “Two Feeding Systems for Lactating Dairy Cows Grazing Fertilized Grasses”. The Journal of Agriculture of the University of Puerto Rico 79, no. 3-4 (July 1, 1995): 99-110. Accessed January 19, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/4305.