1 | The Tees catchment (river factfiles) |
2 | The Tyne catchment (river factfiles) |
3 | The Wear catchment (river factfiles) |
4 | National marine baseline survey 1995 : littoral cell 2 : Flamborough Head to the Wash |
5 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |