References
- Blunt , M.H. and Peake , F.J. , eds. 1975 . Specimens for laboratory examination , 65 – 72 . Wellington : Animal Health Division, Ministry of Agriculture and Fisheries .
- Manktetow , B.W. 1984 . The Veterinary Handbook , 1st edn. , 238 – 240 . Pal-merston North : Massey University .
- Personal communications (various M. A.F. personnel)