DETERMINATION OF THE EFFECTIVE CONCENTRATION 50, 90 AND 99 OF IVERMECTIN AGAINST A STRAIN OF COMMON BOVINE TICK (Rhipicephalus (boophilus) microplus) IN THE PROVINCE OF SANTA FE-ARGENTINA. FAVET. 2021;19(suplemento). doi:10.14409/favecv.v19isuplemento.10944