| 551 | Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA |
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| 552 | An assessment of the causes of non-compliance with river quality standards within the River Tiddy catchment (1989-1991) |
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| 553 | Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests |
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| 554 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 1 : final draft |
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| 555 | An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06 |
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| 556 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
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| 557 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 558 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
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| 559 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 560 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
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| 561 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 562 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 563 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 564 | Environmental snapshot for the East of England [version 1] |
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| 565 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 566 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 567 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 568 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 569 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 570 | PVC : an evaluation using the Natural Step framework |
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| 571 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 572 | Landfill and the water environment : NRA position statement |
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| 573 | The vision for our environment : making it happen |
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| 574 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 575 | Quality audit of biological samples for the 1991 river quality survey |
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