| 51 | The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual) |
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| 52 | River quality in England and Wales : a report of the 1990 survey |
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| 53 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 54 | The 1990 river and estuary classification survey of England and Wales |
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| 55 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 56 | Leachate Monitoring For The Brogborough Test Cell Project |
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| 57 | An investigation into the sewage system and storm overflow at Beer (1997) |
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| 58 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
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| 59 | Guidance on the use of Bioassays in Ecological Risk Assessment |
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| 60 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
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| 61 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |
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| 62 | Biological water quality monitoring in the Midlands region |
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| 63 | Non-compliance with water quality objectives on the Croyde stream (upper catchment) |
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| 64 | Environmental assessment of selected abandoned minewaters in the North East region |
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| 65 | Applications Of Artificial Intelligence For The Biological Surveillance Of River Quality |
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| 66 | Corporate Environmental Reporting in the UK Water Sector - A Concise Review |
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| 67 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 68 | Policy and practice for the protection of groundwater : Thames Region appendix |
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| 69 | Quality audit of biological samples for the 1990 river quality survey |
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| 70 | A review of the optimum accuracy of flow and rainfall forecasting |
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| 71 | The quality of rivers in England and Wales (1990 to 1995) |
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| 72 | The National Centre for Environmental Data and Surveillance : business plan 1999/2000 |
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| 73 | The fuel additive MTBE - a groundwater protection issue? |
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| 74 | The Ribble Estuary 1992 surveys : summary of results |
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| 75 | A report on the River Chew at Chewton Mendip, 6th August 1992 |
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