1. Sequential Medical Plans
2. Report of the Technical Committee to Enquire into the Welfare of Animals kept under Intensive Livestock Husbandry Systems;H.M.S.O,1965
3. Welfare of Livestock. A Report by the Farm Animal Welfare Advisory Committee;H.M.S.O,1970
4. Codes of Recommendations for the Welfare of Livestock. Code No. 3. Domestic Fowls;Ministry of Agriculture,1971