| 551 | Delabole Stream (abandoned minewater) water quality investigation (total zinc) |
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| 552 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report summary : November 1994 |
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| 553 | Water quality archive determinand list |
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| 554 | Further Development and Testing Of Artificial Intelligence Systems for the Classification and Diagnosis of River Quality Based on Biological and Environmental Data |
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| 555 | The Distribution Of Phytoplankton And Nutrients In The North East Irish Sea During 1997; |
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| 556 | River Strat catchment river water quality classification 1990 |
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| 557 | Regional water quality monitoring and surveillance programme for 1993 : biological assessment of rivers : draft report |
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| 558 | National marine baseline survey manual Report No NC/mar/006 |
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| 559 | Gipping/Stour catchment management plan : first annual review |
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| 560 | Water - nature's precious resource : comparative environmental appraisal of strategic options. vol. 2 appendices : supplementary report no. 8 |
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| 561 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
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| 562 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 563 | Rivers Axe and Lim catchment management plan : consultation report |
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| 564 | Welland and Witham estuaries : ecological study : final report (part 1 and part 2) |
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| 565 | Water quality 2000 : a strategy for the water quality function |
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| 566 | The Cam catchment, Anglian region : proposals for statutory water quality objectives |
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| 567 | De-icing Chemicals: Priorities for Environmental Quality Standards Development |
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| 568 | Report for Anglian Water, NRA Unit on the uses of the Orwell and the Stour Estuaries and the use of the mathematical model to derive long term consent limits for all inputs to Orwell Estuary |
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| 569 | River Taw catchment management plan : consultation report |
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| 570 | Water quality report 1990 |
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| 571 | Ecological effects of discharges from watercress farms on the chalk-streams of the NRA Wessex Region |
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| 572 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
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| 573 | Hartland Streams catchment management plan : consultation report |
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| 574 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 575 | Equipment for monitoring alternatives to biochemical oxygen demand and suspended solids (427/1/HO) : interim report |
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