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Rivera Brenes, L., Arroyo, J.A., Cestero, H. and Sierra, A. 1961. Palatability Tests on Giant Pangola grass (Digitaria valida Stent) and Signal grass (Brachiaria brizantha) as compared with Napier (Merker) grass (Pennisetum purpureum). The Journal of Agriculture of the University of Puerto Rico. 45, 3 (Jul. 1961), 147–150. DOI:https://doi.org/10.46429/jaupr.v45i3.13748.