References
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- Moller , K. , Newling , P. E. , Robson , H. J. , Jansen , G. J. and Meusinge , J. A. 1967 . A survey of abortions and long return intervals in dairy herdsin the Huntly district . N.Z. vet. J. , 15 : 137 – 142 .
- New Zealand Dairy Board . 1945 . Twenty-first Annual Report 43 – 43 .
- New Zealand Dairy Board . 1956 . Thirty-second Annual Report 92 – 92 .
- New Zealand Dairy Board . 1974 . Fiftieth Farm Production Report 88 – 88 .