| 126 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
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| 127 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 128 | Biological characteristics and exploitation of sea trout in the River Tywi during 1989 |
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| 129 | Demand for irrigation water (413/1/A) : progress report for the period August 1992 to January 1993 |
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| 130 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 131 | Desktop study of methods for the monitoring of particulate emissions from positively pressurised baghouses |
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| 132 | The government's policy for a public regulatory body in a privatised water industry |
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| 133 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 134 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 135 | An evaluation of discharge and consent compliance policy : a blueprint for the future |
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| 136 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 137 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 138 | Digital groundwater vulnerability maps : 1 : 100,000 series. Policy and practice for the protection of groundwater |
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| 139 | A review of the industrial uses of continuous monitoring systems : minerals industry processes |
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| 140 | Pesticides 1998 : a summary of monitoring of the aquatic environment in England and Wales |
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| 141 | The available resource methodology : a framework for assessing water resources and abstraction availability : final report |
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| 142 | River corridor strategic overview feasibility study : a report to the National Rivers Authority |
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| 143 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : AQC audit |
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| 144 | Guardians of the water environment : NRA Welsh Region (bilingual) : Diogelwyr amgyllchedd dwr : rhanbarth Cymru |
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| 145 | Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales |
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| 146 | NRA programme for the monitoring of water quality Parts 1 to 3 - November 1994 |
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| 147 | Saving water : the NRA's approach to water conservation and demand management : a consultation report |
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| 148 | Water pollution incidents in England and Wales 1994 : report of the National Rivers Authority |
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| 149 | Bathing water quality in England and Wales in 1994 : report of the National Rivers Authority |
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| 150 | Analysis of growth and survival of sea trout from the Welsh Dee: Interim Report, 2nd April 2000 |
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