551 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
552 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
553 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
554 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
555 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
556 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
557 | The River Eden Demonstration Test Catchment (DTC) Data |
558 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
559 | Environmental snapshot for the East of England [version 1] |
560 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
561 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
562 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
|
563 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
564 | The evaluation of Grant/YSU 3800 water quality monitor |
565 | PVC : an evaluation using the Natural Step framework |
566 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
567 | Landfill and the water environment : NRA position statement |
568 | The vision for our environment : making it happen |
569 | Environment Agency guidance on the conditioning of intermediate level waste |
570 | Quality audit of biological samples for the 1991 river quality survey |
571 | Pesticides in the aquatic environment 1997 full report |
572 | The precious resource : a brief guide to managing our water resources |
573 | Quantification of the relationship between effluent quality and biological quality : final report |
574 | Charging for discharges scheme : guidance to the agricultural industry |
575 | Priority and other specific polluting substances and the Water Framework Directive |