Marielisa Ortiz, Guillermo Ortiz, D. Marrero, E. Martinez, M. Rivera, a. Casas, D. Cianzio, and M. Pagan. Cattle Industry Department in Agricultural Sciences College, University of Puerto Rico, Mayaguez Campus, Universidad de Puerto Rico- Recinto Universitario de Mayaguez, P.O. Box 9030, Mayaguez, PR 00681-5000
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