References
- Baxter , J. T. 1958 . On the pattern of Nematodirus infection on pasture and in lambs . Res. exp. Rec. Min. Aeric. Northern Ireland , 7 : 147 – 147 .
- Brunsdon , R. V. 1960 . Studies on the epizootiology of Nematodirus infestation in sheep in New Zealand . N.Z. J. agric. Res. , 3 : 772 – 772 .
- Brunsdon , R. V. 1962 . Age resistance of sheep to infestation with the nematodes Nematodirus filicollis and Nematodirus spathiger . N.Z. vet. J. , 10 : 1 – 1 .
- Gibson , T. E. 1958 . The development and survival of the preparasitic stages of Nematodirus spp. on pasture herbage . J. comp. Path. , 68 : 338 – 338 .
- Gibson , T. E. 1959 . The survival of the free-living stages of Nematodirus spp. on pasture herbage . Vet. Rec. , 71 : 362 – 362 .
- Spedding , C. R. W. , Brown , T. H. and Wilson , I. A. N. 1958 . Observations of Nematodirus spp. infestation in sheep . Vet. Rec. , 70 : 229 – 229 .
- Tetley , J. H. 1959a . The seasonal availability to sheep of infective nematode larvae on pasture . J. Helminth , 33 : 281 – 281 .
- Tetley , J. H. 1959b . The availability of the infective stages of nematode parasites to sheep in early spring . J. Helminth , 33 : 289 – 289 .
- Tetley , J. H. 1959c . The extent to which self-augmentation of nematode parasitism occurs in lambs . J. Helminth , 33 : 293 – 293 .
- Thomas , R. J. 1957 . A comparative study of the infective larvae of Nematodirus species parasitic in sheep . Parasitology , 47 : 60 – 60 .
- Thomas , R. J. 1959 . Field studies on the seasonal incidence of Nematodirus battus and N. filicotlis in sheep . Parasitology , 49 : 387 – 387 .
- Thomas , R. J. 1960 . Ecological studies on the development of the pasture stages of Nematodirus battus and N. filicollis, nematode parasites of sheep . Parasitology , 50 : 31 – 31 .
- Thomas , R. J. and Stevens , A. J. 1956 . Some observations on Nematodirus disease in Northumberland and Durham . Vet. Rec. , 68 : 471 – 471 .