| 126 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 127 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
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| 128 | Desktop study of methods for the monitoring of particulate emissions from positively pressurised baghouses |
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| 129 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 130 | Groundwater pollution : evaluation of the extent and character of groundwater pollution from point sources in England and Wales |
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| 131 | Report for Welsh Region on selected flood defence schemes and the development of a standard methodology for risk assessment |
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| 132 | Freshwater migration of sea trout (Salmo trutta L.) in the river Tywi during 1988, 1989 and 1990 |
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| 133 | The faunal richness of headwater streams. Stage 3 : impact of agricultural activities. Volume 2 : appendices (Note 392) |
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| 134 | Water resources for the future : a strategy for Wales (Bilingual) : Adnoddau dwr ar gyfer y dyfodol (Bilingual) |
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| 135 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
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| 136 | Analysis of growth and survival of sea trout from the Welsh Dee: Interim Report, 2nd April 2000 |
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| 137 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |
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| 138 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |
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| 139 | NRA response to using water wisely : a consultation paper published by the DoE/Welsh Office July 1992 |
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| 140 | The Menai Strait catchment management plan : action plan (bilingual) : Cynllun Rheoli Dalgylch Afon Menai; 1995 Cynllun Gweithredu |
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| 141 | The River Taf catchment management plan : action plan 1995 (bilingual) : Cynllun rheoli dalgylch Afon Taf : cynllun gweithredu 1995 |
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| 142 | An audit of performance in the analysis of biological samples in 2000. Environment Agency : AQC audit : C00158/11 |
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| 143 | An audit of performance in the analysis of biological samples in 2000. Environment Agency : primary audit : C00158/10 |
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| 144 | Groundwater vulnerability of England and Wales : policy and practice for the protection of groundwater : Scale : 1 : 1 000 000 |
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| 145 | Remote sensing and baseline monitoring of the coastal waters of England and Wales 1992-1993 : a survey report [external version] |
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| 146 | Algal growth in the impounded waters of a proposed barrage at Cardiff Bay : prediction using 1989 data |
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| 147 | 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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| 148 | A review of the industrial uses of continuous monitoring systems : incineration processes : a report produced for NCCA and ETSU by Entec |
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| 149 | Chemical river quality 1993-1995 according to the general quality assessment (GQA) scheme [map] : scale 1 : 750 000 |
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| 150 | An audit of performance in the AQC inspection of standard biological macro-invertebrate samples in 2001 : Environment Agency CEH Report Ref: COO 15 8/24 |
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