551 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
552 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
553 | Final report of the controlled cohort investigations into the health effects of bathing in sewage contaminated coastal waters |
554 | An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989 |
555 | Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation |
556 | Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA |
557 | An assessment of the causes of non-compliance with river quality standards within the River Tiddy catchment (1989-1991) |
558 | Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests |
559 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 1 : final draft |
560 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
561 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
562 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
563 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
564 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
565 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
566 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
567 | The River Eden Demonstration Test Catchment (DTC) Data |
568 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
569 | Environmental snapshot for the East of England [version 1] |
570 | The regulation of salmon angling in Great Britain
|
571 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
572 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
573 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
|
574 | Dead zones, live markers: the biological environments of larger U.K. Rivers
|
575 | The Impact Of Particulate Outputs Associated With Timber Harvesting |