| 51 | A report on the River Chew at Chewton Mendip, 6th August 1992 |
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| 52 | A review of the optimum accuracy of flow and rainfall forecasting |
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| 53 | Report on monitoring of environmental quality in the Severn Estuary |
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| 54 | River quality in England and Wales : a report of the 1990 survey |
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| 55 | Charging for discharges scheme : guidance to the agricultural industry |
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| 56 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 57 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 58 | The fuel additive MTBE - a groundwater protection issue? |
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| 59 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 60 | The 1990 river and estuary classification survey of England and Wales |
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| 61 | Applications Of Artificial Intelligence For The Biological Surveillance Of River Quality |
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| 62 | Alternative Methods For The Biological Classification Of Rivers |
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| 63 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
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| 64 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 65 | Environmental assessment of selected abandoned minewaters in the North East region |
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| 66 | Policy and practice for the protection of groundwater : Thames Region appendix |
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| 67 | Non-compliance with water quality objectives on the Croyde stream (upper catchment) |
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| 68 | Development of an Estuarine Classification Scheme for the Water Framework Directive |
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| 69 | The National Centre for Environmental Data and Surveillance : business plan 1999/2000 |
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| 70 | 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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| 71 | A study of the use of Glycol-based de-icers at RAF Lyneham and their impact on local watercourses during the winter of 1999/2000 |
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| 72 | Changes in the phosphorus content of the sediment of Esthwaite Water and water quality in response to a decreasing input of sewage-borne phosphorus |
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| 73 | The Use of Catch Statistics to Monitor Fishery Change - Coarse Fish Study - Synopsis |
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| 74 | Discharge monitoring in the Kennet catchment. Part 2 : ecological effects of fish farm discharges |
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| 75 | Microbiological examination of coastal waters in the North West : summary of results 1998 |
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