1. P. T. Williams , Waste Treatment and Disposal, Wiley, Chichester, 1998
2. K. Westlake , in Waste Treatment and Disposal, ed. R. E. Hester and R. M. Harrison, Royal Society of Chemistry, Cambridge, 1995, pp. 43–67
3. Great Britain, Deposit of Poisonous Waste Act 1972, The Stationery Office, London, 1972, ch. 21
4. Great Britain, Control of Pollution Act 1974, The Stationery Office, London, 1974, ch. 40
5. Environmental effects of landfills