1 | Domesday to the dawn of the new millennium : 900 years of the Don Fishery |
2 | A litter assessment of two major tributaries of the Taff, the Cynon and the Rhondda : surveyed March - April 1990 |
3 | Impact assessment of acidic and metalliferous pollution in the Fowley Stream |
4 | The Impact of Grazing and Upland Management on Erosion and Runoff |