| 601 | Roadford operational and environmental study : draft final report : Volume 5 : annex G monitoring, annex H reservior operating agreement |
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| 602 | Regional water quality monitoring and surveillance programme for 1993 : quality investigations in controlled waters : final draft report |
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| 603 | North West Norfolk catchment management plan : summary report : March 1995 |
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| 604 | River Otter : environmental data review. Volume 2 : text : River Otter environmental study 1993/94 |
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| 605 | Environmental impact assessment : River Allen flood alleviation scheme |
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| 606 | River Otter : environmental data review. Volume 4 : appendices : River Otter environmental study 1993/94 |
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| 607 | Modelling habitat requirements of coarse fish in lowland rivers |
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| 608 | Water resources planning : Nar groundwater unit water resources management plan |
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| 609 | Water in the Thetford area
|
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| 610 | River Stour (2), Sudbury : report of a river corridor survey carried out for the National Rivers Authority, Anglian region |
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| 611 | River Dart catchment river water quality classification 1990 |
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| 612 | River quality : July 1990 - June 1991 |
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| 613 | Health status of otters in southern and south west England 1996-2003 |
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| 614 | Economic appraisal of low flow alleviation : guidelines on desk top analysis : draft |
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| 615 | Yare catchment management plan : consultation report summary |
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| 616 | River Wissey investigations : linking hydrology and ecology : the basis for in-river flow management. Final Draft (OI/526/ ) |
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| 617 | Further guidance on the environmental assessment of projects |
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| 618 | Valuing Water Use in Scotland and Northern Ireland for WFD Implementation Purposes |
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| 619 | Contracts Department (National Rivers Authority) |
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| 620 | Waterways Breeding Bird Survey Pilot Study 1998: Adaptation of BBS Census Methods to Rivers and Canals |
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| 621 | River Irwell catchment management plan : water quality supplement |
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| 622 | River habitats in England and Wales : a national overview : river habitat survey report no 1 |
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| 623 | The utilisation of stick-pile otter holts in south east Wales |
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| 624 | The River Ash : enhancement project |
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| 625 | Time of travel on the River Lee under high and medium flow : appendix b : time of travel on the small River Lee |
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