| 551 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
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| 552 | Rivers of the Isle of Wight fact file |
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| 553 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
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| 554 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
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| 555 | 'Sea Vigil' water quality monitoring : the East coast 1992-1993 |
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| 556 | Catches of migratory fish in the River Don, Aberdeenshire |
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| 557 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 558 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
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| 559 | The 1990 river and estuary classification survey of England and Wales |
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| 560 | The evaluation of an orion ammonium ion selective electrode (220/15/T) |
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| 561 | An Independent Review of the Defra/EA Research and Development Joint |
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| 562 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
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| 563 | Dissemination of the Revitalised FEH Rainfall-runoff Method |
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| 564 | General guide to the prevention of water pollution |
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| 565 | Guidance on the use of Soil Screening Values for Ecological Risk Assessment |
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| 566 | Highway runoff: Effects of soluble pollutants on the ecology of receiving waters |
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| 567 | Life cycle assessment of disposable and reusable nappies in the UK |
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| 568 | Managing the social aspects of flooding: Synthesis Report |
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| 569 | Model For Investigating The Impacts Of Groundwater Abstraction |
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| 570 | National guidelines for the production of NRA regions 1990/91 regional plans |
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| 571 | Operational mechanisms for the protection and enhancement of headwaters |
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| 572 | Procurement legislation and the NRA : a brief guide |
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| 573 | Strategic review of development and flood risk : the River Welland catchment |
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| 574 | Strategic review of development and flood risk : the River Witham catchment |
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| 575 | Survey of copper speciation in the Great Ouse estuary |
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