Emrich, Edywald Soeiro, Marcus Cordeiro Durães, Herbert Vilela, and Carmem Silva Pereira. 2014. “The Use of Urea and Blood Meal in Rations for Crossbred Heifers (Red and White Holstein X Guzera)”. Pesquisa Agropecuaria Brasileira 9 (3):1-6. https://doi.org/10.1590/S1678-3921.pab1974.v9.17153.