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https://www.mediafire.com/file/d2kw55en6ecrlyp/Veterinary_Parasitology_Volume_23_issue_3-4_1987_%5Bdoi_10.1016%252F0304-4017%252887%252990013-6%5D_S.C._Tolliver%3B_E.T._Lyons%3B_J.H._Drudge_--_Prevalence_of_internal_parasites_in_horses_in_critical_tests_of_acti.pdf/file