共 50 条
- [8] Herd-level economic analysis of the impact of paratuberculosis on dairy herds JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION, 1999, 214 (06): : 822 - 825
- [9] Herd-level risk factors for cow and calf on-farm mortality in Estonian dairy herds Acta Veterinaria Scandinavica, 62