Great Britain. Welsh Office, Great Britain. Department of the Environment, Swyddfa Gymreig, 1974

Great Britain. Department of the Environment, Great Britain. Department of Education and Science, JURUE, University of Aston in Birmingham. Department of Educational Enquiry, 1981

Great Britain. Department of the Environment, Department of the Environment,

Great Britain. Department of the Environment, 1979

Great Britain. Welsh Office, Great Britain. Department of the Environment, Great Britain. Ministry of Agriculture, Fisheries and Food, 1989

Great Britain. Department of the Environment, Department of the Environment, Environmental Protection Statistics Division,

Great Britain. Department of the Environment, Richards Moorehead & Laing Ltd, 1995

Great Britain. Department of the Environment, Department of the Environment,

Great Britain. Department of the Environment, Department of the Environment,

Great Britain. Department of the Environment, 1997

Department of the Environment, Carnwath, Robert, 1989

Department of the Environment, Lynn, Peter,

Great Britain. Department of the Environment, Department of the Environment, Environmental Protection Statistics Division,

Welsh Office, Department of the Environment, Scottish Office, Committee of Inquiry into the Conduct of Local Authority Business, Widdicombe, David, 1986

Welsh Office, Department of the Environment,

Welsh Office, Department of the Environment,

Department of the Environment,

Great Britain. Department of the Environment, Department of the Environment,

Department of the Environment,

Welsh Office, Department of the Environment, Scottish Office, Committee of Inquiry into the Conduct of Local Authority Business, Widdicombe, David, 1986

Great Britain. Welsh Office, Great Britain. Department of the Environment, Great Britain. Ministry of Agriculture, Fisheries and Food, 1989

Great Britain. Department of the Environment, Department of the Environment,

Great Britain. Department of the Environment, 1997

Great Britain. Department of the Environment, Department of the Environment, Environmental Protection Statistics Division,

Great Britain. Department of the Environment, Department of the Environment,

Great Britain. Welsh Office, Great Britain. Department of the Environment, Swyddfa Gymreig, 1974

Great Britain. Department of the Environment, 1979

Great Britain. Department of the Environment, Great Britain. Department of Education and Science, JURUE, University of Aston in Birmingham. Department of Educational Enquiry, 1981

Great Britain. Department of the Environment, Department of the Environment,

Great Britain. Department of the Environment, Richards Moorehead & Laing Ltd, 1995

Welsh Office, Department of the Environment, Scottish Office, Committee of Inquiry into the Conduct of Local Authority Business, Widdicombe, David, 1986

Welsh Office, Department of the Environment, Scottish Office, Committee of Inquiry into the Conduct of Local Authority Business, Widdicombe, David, 1986

Great Britain. Department of the Environment, Department of the Environment, Environmental Protection Statistics Division,

Department of the Environment,

Welsh Office, Department of the Environment,

Welsh Office, Department of the Environment,

Department of the Environment,

Department of the Environment, Carnwath, Robert, 1989

Department of the Environment, Lynn, Peter,

Great Britain. Department of the Environment, Department of the Environment,