| 601 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
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| 602 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
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| 603 | Rivers of the Isle of Wight fact file |
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| 604 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
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| 605 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
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| 606 | The Mersey estuary : a report on environmental quality |
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| 607 | Catches of migratory fish in the River Don, Aberdeenshire |
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| 608 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 609 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
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| 610 | The 1990 river and estuary classification survey of England and Wales |
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| 611 | An Independent Review of the Defra/EA Research and Development Joint |
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| 612 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
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| 613 | Dissemination of the Revitalised FEH Rainfall-runoff Method |
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| 614 | General guide to the prevention of water pollution |
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| 615 | Guidance for the Development of Housing on Land Affected by Contamination |
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| 616 | Guidance on the use of Soil Screening Values for Ecological Risk Assessment |
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| 617 | Highway runoff: Effects of soluble pollutants on the ecology of receiving waters |
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| 618 | Life cycle assessment of disposable and reusable nappies in the UK |
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| 619 | Managing the social aspects of flooding: Synthesis Report |
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| 620 | Model For Investigating The Impacts Of Groundwater Abstraction |
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| 621 | National guidelines for the production of NRA regions 1990/91 regional plans |
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| 622 | Operational mechanisms for the protection and enhancement of headwaters |
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| 623 | Policy and practice for the protection of groundwater : regional appendix Welsh region |
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| 624 | Procurement legislation and the NRA : a brief guide |
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| 625 | Strategic review of development and flood risk : the River Welland catchment |
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