Managing the countryside : preventing water pollution.
Great Britain.Department of Agriculture and Rural Development for Northern Ireland.
Northern Ireland.Environment and Heritage Service.
Fisheries Conservancy Board for Northern Ireland.
Irish Lights Commission.
[Northern Ireland?] : produced by the Department of Agriculture and Rural Development, and the Environment and Heritage Service, in association with the Fisheries Conservancy Board and  the Loughs Agency of the Foyle, Carlingford and Irish Lights Commission,
[1999?]
Cover title.