References
- Anon. British Veterinary Association Members' Information Supplement No. 69 1971 190 191
- Blood , D. C. and Henderson , J. A. 1968 . Veterinary Medicine , 3rd ed. , 289 – 289 . London : Balliere, Tindall and Cox .
- During , C. 1972 . Fertilizers and Soils in New Zealand Farming , 2nd ed. , Wellington : N.Z. Department of Agriculture .
- McNaught , K. J. and Ludecke , T. E. 1967 . Effect of fertilizers on pasture magnesium levels . Proc. Ruakura Fmrs' Conf. Week , : 63 – 69 .