1 | The effect of the voluntary initiative on water quality |
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 | Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species |
4 | Investigations into the status of fisheries, biological and water quality in the River Pelenna catchment, prior to the treatment of discharges from abandoned coal mines : PL/EAW/95/3 |
5 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
6 | The quality of rivers in England and Wales (1990 to 1995) |
7 | The 1990 river and estuary classification survey of England and Wales |
8 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
9 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
10 | An audit of performance in the primary analysis of standard biological macro-invertebrate samples in 2001 : Environment Agency CEH Report Ref: COO 158/23 |