451 | An audit of performance in the AQC inspection of standard biological macro-invertebrate samples in 2002 : The Environment Agency (C00158/31) |
452 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
453 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
454 | Final report of the controlled cohort investigations into the health effects of bathing in sewage contaminated coastal waters |
455 | An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley |
456 | River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man |
457 | Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation |
458 | Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA |
459 | Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests |
460 | An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06 |
461 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
462 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
463 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
464 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
465 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
466 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
467 | The River Eden Demonstration Test Catchment (DTC) Data |
468 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
469 | The regulation of salmon angling in Great Britain
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470 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
471 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
472 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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473 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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474 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
475 | The evaluation of Grant/YSU 3800 water quality monitor |