Sumano, Héctor, José A. Valencia, Marcela Viveros, Graciela Tapia-Pérez, and Lilia Gutiérrez. 2020. “fficacy of an xtended-elease ilmicosin reparation and ulathromycin in the reatment of ovine espiratory isease”. eterinaria México A 7 (4). https://doi.org/10.22201/fmvz.24486760e.2020.4.787.