RANDEL, P. F. Supplemental concentrates with four levels of crude protein for grazing Dairy Cows. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 74, n. 3, p. 281–292, 1990. DOI: 10.46429/jaupr.v74i3.6661. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/6661. Acesso em: 18 aug. 2022.