Caro Costas, Rubén, and José Vicente Chandler. 1979. “Comparative Productivity of Intensively Managed Star and GuineaGrass Pastures in Terms of Milk Production in the Humid Mountain Region of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 63 (4):436-42. https://doi.org/10.46429/jaupr.v63i4.10259.