Caro-Costas, Rubén, and J. Vicente-Chandler. “MILK PRODUCTION BY HOLSTEIN COWS FED ONLY ON GRASS DURING FIVE CONSECUTIVE LACTATIONS”. The Journal of Agriculture of the University of Puerto Rico, vol. 60, no. 3, July 1976, pp. 436-8, doi:10.46429/jaupr.v60i3.10535.