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 (October 1, 1995): 99–110. Accessed April 25, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/4305.