1 | The environmental impact of the foot and mouth disease outbreak: and interim assessment |
2 | Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers |
3 | A review of factors affecting the abundance and catch of spring salmon fom the River Wye and elsewhere, and proposals for stock maintenance and enhancement |
4 | Biological characteristics and exploitation of sea trout in the River Tywi during 1989 |