References
- Cagienard , B. 1973 . Some observations on disease incidence among dairy cattle in North Taranaki . N.Z.vet.J. , 21 : 170 – 174 .
- Anon Practitioner Records Surveillance 1977 1977 2 21 23
- N.Z. Dairy Board . 1981 . Farm Production Report Vol. 57 , 51 – 51 .