501 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
502 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
503 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
504 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
505 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
506 | The River Eden Demonstration Test Catchment (DTC) Data |
507 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
508 | Environmental snapshot for the East of England [version 1] |
509 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
510 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
511 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
|
512 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
513 | The evaluation of Grant/YSU 3800 water quality monitor |
514 | PVC : an evaluation using the Natural Step framework |
515 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
516 | Landfill and the water environment : NRA position statement |
517 | The vision for our environment : making it happen |
518 | Environment Agency guidance on the conditioning of intermediate level waste |
519 | Quality audit of biological samples for the 1991 river quality survey |
520 | Pesticides in the aquatic environment 1997 full report |
521 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994 |
522 | The precious resource : a brief guide to managing our water resources |
523 | Quantification of the relationship between effluent quality and biological quality : final report |
524 | Charging for discharges scheme : guidance to the agricultural industry |
525 | Priority and other specific polluting substances and the Water Framework Directive |