References
- Aasen , A J. , Culvenor , E. C. T. , Finnie , E. P. , Kellock , A W. and Smith , L. W. 1969 . Australian Journal of Agricultural Research , 20 : 71 – 86 .
- Armstrong , M. C. 1956 . N.Z. Journal of Agriculture , 93 : 56 – 56 .
- Arnold , G. W. 1960 . Australian Journal of Agricultural Research , 11 : 1026 – 1033 .
- Clegg , F. G. and Watson , W. A. 1960 . The Veterinary Record , 72 ( 36 ) : 731 – 733 .
- Cunningham , J. J. and Hartley , W. J. 1959 . N.Z. Veterinary Journal , 7 : 1 – 7 .
- Gilruth , J. A. 1906 . Annual Report of the N.Z. Department of Agriculture , 14 : 293 – 297 .
- Keogh , R. G. 1973 . N.Z. Journal of Experimental Agriculture , 1 : 51 – 54 .
- Lancashire , J. A. and Keogh , R. G. Proceedings of the N.Z. Grassland Association . Vol. 26 , pp. 153 – 163 .
- Lancashire , J. A. and Keogh , R. G. 1968 . Sheepfarming Annual , 14 : 29 – 35 .
- Shaw , J. N. and Muth , O. H. 1949 . Journal of the American Veterinary Medical Association , 114 : 315 – 317 .
- Thornton , R. H. 1964 . N.Z. Veterinary Journal , 12 : 13 – 16 .