References
- BRAMBELL, F.W.R. (1965) Report of the Technical Committee to Enquire into the Welfare of Animals kept under Intensive Livestock Husbandry Systems. HMSO, London
- FLEMMING, A. (1957) Penicillin. Encyclopaedia Britannica 17: 464–466
- RICHMOND, M. (1990) The Microbial Safety of Food. Report of the Committee on the Microbiological Safety of Food. HMSO, London
- SWANN, M.M. (1969) Joint Committee on the Use of Antibiotics in Animal Husbandry and Veterinary Medicine: Report. HMSO, London