1 | The Environment Agency's state of the environment report for Thames Region |
2 | A litter assessment of two major tributaries of the Taff, the Cynon and the Rhondda : surveyed March - April 1990 |
3 | State of the environment report for Thames Region : first update 2001 |
4 | The River Tywi catchment management plan : action plan (bilingual) |
5 | Freshwater migration of sea trout (Salmo trutta L.) in the river Tywi during 1988, 1989 and 1990 |