| 51 | Water Quality and Freshwater Flow in the Thames Tideway in Relation to Salmon Migration, with particular reference to the effects of low flow in 1990 |
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| 52 | The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria |
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| 53 | Assessing the impact of sewage effluent disposal on groundwater (phase 2): final report |
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| 54 | Review of Literature on the Effect on Aquatic Communities of Particulate Copper in River Systems
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| 55 | Herbicides for use in or near the aquatic environment: Priorities for Environmental Quality Standards Development |
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| 56 | Survey of physical characteristics of salmon spawning riffles in the river North Tyne
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| 57 | Use Of Pattern Recognition To Identify The Source Of An Oil Spill On An Inland Water |
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| 58 | Best Available Techniques For The Control Of Pollution In Inorganic Chemical Processes - Appendix |
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| 59 | Evaluating the impact of groundwater abstraction on key conservation sites. Stage 1 reports for AMP3 |
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| 60 | Analysis of growth and survival of sea trout from the Welsh Dee: Interim Report, 2nd April 2000 |
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| 61 | An investigation into the presence of high levels of cadmium in sea-water samples from Mounts Bay, Cornwall |
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| 62 | Developing Quality Assurance for Fish Counter Data - Phase 1: An Assessment of the Salmonid Fish Counter Network in England and Wales |
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| 63 | Further monitoring of the impact of Crown Dale waste water treatment works final effluent on water quality |
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| 64 | Report on two electrofishing surveys carried out between July 10-25 1978 and July 9-12 1979 on the proposed Kielder Water
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| 65 | An Assessment of the Feasibility of Using DGT Procedures to Measure Trace Metals and Radionuclides in Rivers |
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