| 26 | A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89 |
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| 27 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
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| 28 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
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| 29 | Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests |
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| 30 | Quality audit of biological samples for the 1991 river quality survey |
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| 31 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 32 | An Aerial Photograph of Ferry House and The Pearsall Building |
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| 33 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
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| 34 | The 1990 river and estuary classification survey of England and Wales |
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| 35 | Identification of water quality problems in the Strat and Neet catchments |
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| 36 | Method for the assessment of river water quality using benthic macroinvertebrates |
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| 37 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
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| 38 | Guidance on the use of Bioassays in Ecological Risk Assessment |
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| 39 | Biological water quality monitoring in the Midlands region |
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| 40 | Bacteriological monitoring of freshwater rivers in the Thames Region 1995 |
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| 41 | Environmental assessment of selected abandoned minewaters in the North East region |
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| 42 | Applications Of Artificial Intelligence For The Biological Surveillance Of River Quality |
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| 43 | Metallothionein in eels from the Thames Estuary : an indicator of environmental quality |
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| 44 | The quality of rivers in England and Wales (1990 to 1995) |
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| 45 | The River Colne Estuary subtidal biological survey 1992 |
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| 46 | The drought of 1988-1992 in Anglia : a review |
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| 47 | Alternative Methods For The Biological Classification Of Rivers |
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| 48 | Investigation to determine the cause of the long-term BOD failure at Higher Weaver routine monitoring site (70532960) for 1995 and 1997 |
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| 49 | An ecological study of the effects of ferric dosing on the plankton and benthic invertebrates of Grafham Water between May 1990 and November 1991 |
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| 50 | Results of the oyster (Crassostrea gigas) embryo-larval biassay on samples taken during the winter phase of national maritime monitoring programme 1997 : interim report |
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