| 4001 | Analysis of growth and survival of sea trout from the Welsh Dee: Interim Report, 2nd April 2000 |
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| 4002 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 4003 | Manual For Biological Methods - Phase 1 |
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| 4004 | Equipment for monitoring alternatives to biochemical oxygen demand and suspended solids (427/1/HO) : interim report |
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| 4005 | Summary of Fisheries Statistics 1993 |
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| 4006 | Identified uses of tidal waters : volume 1 |
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| 4007 | St Columb Major STW UV disinfection survey 1994 : final draft report |
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| 4008 | Training guidance notes : control of pollution farm waste regulations |
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| 4009 | Development and mapping of WFD ecological status classes to RAM river flow objectives |
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| 4010 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 4011 | Supplementary survey of contaminated land : report |
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| 4012 | Take to the water : a beginner's guide to boating on inland waterways |
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| 4013 | Guidelines on statutory returns : Bathing Waters Directive |
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| 4014 | Thames Region : EC dangerous substances directive : STW data 1991-1992 |
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| 4015 | A Methodology To Derive Groundwater Clean-Up Standards. Volume 2: Background Information |
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| 4016 | The role of the National Rivers Authority in droughts |
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| 4017 | Material safety data sheet |
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| 4018 | Regional water quality monitoring and surveillance programme for 1992 : biological impact assessment of discharges on receiving waters |
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| 4019 | River Glen : river channel assessment : annex C : an assessment of low flow characteristics of the River Glen, Lincolnshire |
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| 4020 | River quality : 1993 |
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| 4021 | Fishery survey of the River Axe catchment |
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| 4022 | Metal contamination of sediments an statutory quality objectives R and D (331/8/N) |
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| 4023 | Effects on gammarus of sediments impacted by watercress farms |
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| 4024 | Synoptic State of the Environment Monitoring |
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| 4025 | Evaluation of the effectiveness of the Water Fringe Option Scheme on Environmental Quality |
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