6Holste J E,Colwell D D,Kumar R. Efficacy of eprinomectin against hypoderma spp in cattle[J]. AmJ Vet Res, 1998, 59(1): 56-58.
7Pitt S R, Langholff W K, Eagleson J S. The efficacy of eprinomectin against induced infections of immature (fourth larvalstage)and adult nematode parasites in cattle[J].Vet Parasitol, 1997, 73(1/2). 119-128.
9Holste J E, Colwell D D, Kumar R. Efficacy of eprinomectin against hypoderma spp in cattle [ J ~. AmJ vet Res, 1998,59( 1 ) : 56-58.
10Pitt S R. Langholff W K, Eagleson J S. The emcacy of eprinomect in against induced infections of immature (fourthlarvalstage) and adult nematode parasites in cattle. VetParasitol[ J]. 1997,73( 1 -2):119-128.
