References
- Brunsdon , R.V. and Adam , J.L. 1975 . Internal Parasites and Animal Production , 53 – 53 . New Zealand Society of Animal Production . Occasional Publication No. 4
- Carmichael , I. , Visser , R. , Schneider , D. and Soll , M. 1987 . Haemonchus contortus resistance to ivermectin . J.S. Afr. vet. Assoc. , 58 : 93 – 93 .
- McKenna , P.B. and Watson , T.G. 1987 . The comparative efficacy of four broad spectrum anthelmintics against some experimentally induced trichostrongylid infections in sheep and goats . N.Z. vet. J. , 35 : 192 – 195 .
- Martin , P.J. , Anderson , N. , Brown , T.H. and Miller , D.W. 1988 . Changes in resistance of Ostertagia spp. to thiabendazole following natural selection or treatment with levamisole . Int. J. Parasitol , 18 : 333 – 340 .
- Porter , D.A. 1953 . Cross transmission of parasitic worms between cattle and sheep . Am. J. vet. Res. , 14 : 550 – 554 .