“Values for Protein Fat Ratio and Milk Urea Nitrogen in Milk from Dairy Cows in Northern Alajuela and Heredia, Costa Rica”. Ciencias veterinarias 34, no. 2 (January 14, 2017): 67–80. Accessed November 21, 2024. https://www.revistas.una.ac.cr/index.php/veterinaria/article/view/9030.