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A. R. Riascos
Servicio Nacional de Aprendizaje SENA. Regional Putumayo, Colombia
Colombia
J. J. Reyes
Instituto de Investigación Pastos y Forrajes. Avenida Independencia km 8½, Boyeros. CP. 10 800. La Habana, Cuba
Cuba
L. Dihigo
Centro de Investigación para el Mejoramiento Genético de la Ganadería Tropical (CIMAGT). Ave 101 e/ 100 y 62 No. 62, Cotorro. La Habana, Cuba
Cuba
Y. Medina
Instituto de Ciencia Animal, Dpto. de Rumiantes. Apartado Postal 24, San José de Las Lajas. Mayabeque, Cuba
Cuba
J. P. Narvaez
Servicio Nacional de Aprendizaje SENA. Regional Putumayo, Colombia
Colombia
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