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476Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
477A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
478Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
479Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
480Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank
481The Economics of No-Spray Zones - a Study of the Risks and Benefits of Pesticide No-Spray Restrictions
482Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph
483Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991
484An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989
485An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley
486River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man
487Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation
488Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA
489An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06
490Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993
491NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group
492Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report
493Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922
494PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps
495POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS
4961967 - IBP Lake George, Uganda - starting to build the bedroom block
497The regulation of salmon angling in Great Britain
498The Evaluation of Acoustic Doppler Current Profiler Equipment
499Modelling phytoplankton development in the proposed Cardiff Bay Barrage
500Dead zones, live markers: the biological environments of larger U.K. Rivers