Pence, Mel, John U. Thomson, and Dana Cole. 2004. “Important Elements of the HACCP Process to Control Johne’s Disease, Bovine Viral Diarrhoea Virus (BVDV, and Bovine Leukaemia Virus (BLV)”. The Bovine Practitioner 38 (2):126-32. https://doi.org/10.21423/bovine-vol38no2p126-132.