| 26 | 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 |
|---|
| 27 | The Use Of DNA Fingerprinting To Study The Population Dynamics Of Otters (Lutra Lutra) In Southern Britiain - A Feasibility Study |
|---|
| 28 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
|---|
| 29 | A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89 |
|---|
| 30 | The biology of the sea trout. Summary of a symposium held at Plas Menai 24-26 October 1984 |
|---|
| 31 | Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests |
|---|
| 32 | An assessment of the impact of Berkhamsted and Maple Lodge STWs on the Grand Union canal based on macroinvertebrate surveys |
|---|
| 33 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
|---|
| 34 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
|---|
| 35 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
|---|
| 36 | Guidance on the use of Bioassays in Ecological Risk Assessment |
|---|
| 37 | Assessing and controlling the ecotoxicity of complex effluents |
|---|
| 38 | Quality audit of biological samples for the 1990 river quality survey |
|---|
| 39 | The quality of rivers in England and Wales (1990 to 1995) |
|---|
| 40 | Method for the assessment of river water quality using benthic macroinvertebrates |
|---|
| 41 | An assessment of water quality in the River Yarty catchment |
|---|
| 42 | The River Colne Estuary subtidal biological survey 1992 |
|---|
| 43 | Quality audit of biological samples for the 1991 river quality survey |
|---|
| 44 | The drought of 1988-1992 in Anglia : a review |
|---|
| 45 | Eel and elver studies in the Severn : interim report (256/6/ST) |
|---|
| 46 | Operational mechanisms for the protection and enhancement of headwaters |
|---|
| 47 | Quantification of the relationship between effluent quality and biological quality : final report |
|---|
| 48 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
|---|
| 49 | Stream survey and assessment in the Ashford and Folkestone areas |
|---|
| 50 | Identification of water quality problems in the Strat and Neet catchments |
|---|
