1. SCOPS – Sustainable Worm Control Strategies for Sheep;Abbott,2012
2. The future of sustainability: re-thinking environment and development in the twenty-first century;Adams;Future Sustain.,2006
3. Deadweight Sheep Prices [WWW Document];AHDB,2019
4. Market Intelligence Publications - Cattle and Sheep Weekly [WWW Document];AHDB,2019
5. Stocktake Report 2016;AHDB,2016