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Edmonds MD, Johnson EG, Edmonds JD. Anthelmintic resistance of Ostertagia ostertagi and Cooperia oncophora to macrocyclic lactones in cattle from the western United States. Vet Parasitol. 2010 Jun 24;170(3-4):224–9. doi: 10.1016/j.vetpar.2010.02.036. PMID: 20347229. |