References
- Mackintosh , D.G. , Marshall , R.B. and Broughton , E.S. 1980 . The use of a hardjo-pomona vaccine to prevail leptospiruria in cattle exposed to natural challenge with Leptospira interragans serovar hardjo . N.Z. vet. J. , 28 : 174 – 177 .
- Marshall , R.B. , Broughton , E.S. and Hellslrom , J.S. 1979 . Protection of cattle against natural challenge with Leptospira interrogans serovar hardjo using a haradjo-pomona vaccine . N.Z. vet. J. , 27 : 114 – 116 .