Soldevila, Manuel, y Blas. «BIRTH WEIGHT AND HEIGHT AT THE WITHERS OF PUREBRED AND GRADE HOLSTEIN HEIFER CALVES OF THE AGRICULTURAL EXPERIMENT STATION HERD». Journal of Agriculture of the University of Puerto Rico 52, no. 2 (abril 1, 1968): 177–178. Accedido agosto 17, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/11503.