1. Observer,1990
2. Department of the Environment, Digest of Environmental Protection and Water Statistics, HMSO, London, UK, annual.
3. This Common Heritage: Britain's Environmental Strategy;Department of the Environment,1990
4. Environmental information for all: The need for a monthly index;Hope;Energy Policy,1990
5. Northern Ireland Department of Planning and Finance, Northern Ireland Annual Abstract of Statistics, Policy Planning and Research Unit, Department of Planning and Finance, Stormont, Belfast, annual. This includes a section of environmental statistics.