References
- Andrews , E. D. , Hart , L. I. and Stephenson , B. J. 1960 . Vitamin B12 and cobalt in livers from grazing cobalt-deficient lambs and from others given various cobalt supplements . N.Z. J. agric. Res. , 3 : 364 – 376 .
- Andrews , E. D. and Hogan , K. G. 1972 . Methylmalonic acid excretion and incipient cobalt deficiency disease in sheep . N.Z. vet. J. , 20 : 33 – 38 .
- Andrews , E. D. , Hogan , K. G. , Stephenson , B. J. , White , D. A. and Elliott , D. C. 1970 . Cobalt and thiabendazole live-weight responses in grazing sheep and their relation to the urinary excretion of methylmalonic acid . N.Z. J. agric. Res. , 13 : 950 – 965 .
- Andrews , E. D. and Stephenson , B. J. 1966 . Vitamin B12 in the blood of grazing cobalt-deficient sheep . N.Z. J. agric. Res. , 9 : 491 – 507 .
- Gawthorne , J. M. 1968 . The excretion of methylmalonic and formiminoglutamic acids during the induction and remission of vitamin B12 deficiency in sheep . Aust. J. biol. Sci. , 21 : 789 – 794 .
- Giorgio , A. J. and Plaut , G. N. E. 1965 . A method for the colorimetric determination of urinary methylmalonic acid in pernicious anemia . J. Lab. clin. Med. , 66 : 667 – 676 .
- Hogan , K. G. , Lorentz , P. P. and Gibb , F. M. 1973 . The diagnosis and treatment of vitamin B12 deficiency in young lambs . N.Z. vet. J. , 21 : 234 – 237 .
- Krieger , C. H. 1954 . Report on vitamin B12 microbiological method . J. Ass. off. agric. Chem. , 37 : 781 – 792 .
- Millar , K. R. and Lorentz , P. P. 1974 . A gas chromatographic method for the determination of methylmalonic acid in urine . J. Chromatog. , 101 : 177 – 181 .