ENVIROMENTAL AND GENETIC ASPECTS THAT INFLUENCE ON THE AGE AT FIRST CALVING IN A NATIVE CATTLE OF COLOMBIA (ROMOSINUANO) Journal title: Revista MVZ Cordoba Authors: Marco Suárez| Universidad Agraria de la Habana. Facultad de Medicina Veterinaria. Departamento de Pr... Subject(s): Medicine, Agricultural Science, Biotechnology, Cellular Biology, Biomedical Engineering