Salazar-Carranza, Mauren, Gloriana Castillo-Badilla, Jaime Murillo-Herrera, Frank Hueckmann-Voss, and Juan José Romero-Zuñiga. 2013. “Age at First Calving in Holstein Dairy Cows Specialized in Costa Rica”. Agronomía Mesoamericana 24 (2):233-43. https://doi.org/10.15517/am.v24i2.12522.