References
- Clackson , DA and Ward , WR . 1991 . Farm tracks, stockman's herding and lameness in dairy cattle . Veterinary Record , 129 : 511 – 512 .
- Tranter , W P and Morris , RS . 1991 . A case study of lameness in three dairy herds . New Zealand Veterinary Journal , 39 : 88 – 96 .