Castillo-Badilla, Gloriana, Mauren Salazar-Carranza, Jaime Murillo-Herrera, and Juan José Romero-Zúñiga. 2013. “Effect of Age at First Calving on Productive Parameters in Costa Rican Jersey Cows”. Agronomía Mesoamericana 24 (1):177-87. https://doi.org/10.15517/am.v24i1.9796.