| 551 | PVC : an evaluation using the Natural Step framework |
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| 552 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 553 | Quality audit of biological samples for the 1991 river quality survey |
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| 554 | Pesticides in the aquatic environment 1997 full report |
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| 555 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994 |
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| 556 | The precious resource : a brief guide to managing our water resources |
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| 557 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 558 | Charging for discharges scheme : guidance to the agricultural industry |
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| 559 | Priority and other specific polluting substances and the Water Framework Directive |
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| 560 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |
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| 561 | An Aerial Photograph of Ferry House and The Pearsall Building |
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| 562 | Review of existing practices for fluvial grass management throughout the NRA (213/1/Y) |
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| 563 | The interpretation of rod and net catch data |
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| 564 | Problems with sea trout and salmon in the Western Highlands |
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| 565 | Clear Options towards an operational model for the Lee Valley Reservoirs |
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| 566 | The Cam catchment : recommendations for statutory water quality objectives |
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| 567 | The River Cam catchment management plan : annual monitoring report |
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| 568 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
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| 569 | The National Centre for Toxic and Persistent Substances |
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| 570 | Algal blooms in the Lower Tees- Perspectives and prospects
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| 571 | Acidification of freshwaters: the threat and its mitigation |
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| 572 | Pearl Mussel Image: First out of the blocks |
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| 573 | Statement on public consultation for the Dove CMP : July 1995 |
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| 574 | The Warwickshire Avon catchment management plan : final plan : October 1994 |
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| 575 | FWR - User guide for assessing the impact of combined sewer overflows |
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