| 451 | Water in the Thetford area
|
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| 452 | East Looe river : river ecosystem (RE) non-compliance investigation : final draft report |
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| 453 | River Stour (2), Sudbury : report of a river corridor survey carried out for the National Rivers Authority, Anglian region |
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| 454 | River Dart catchment river water quality classification 1990 |
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| 455 | River quality : July 1990 - June 1991 |
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| 456 | Health status of otters in southern and south west England 1996-2003 |
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| 457 | Economic appraisal of low flow alleviation : guidelines on desk top analysis : draft |
|---|
| 458 | River Wissey investigations : linking hydrology and ecology : the basis for in-river flow management. Final Draft (OI/526/ ) |
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| 459 | River Gannel catchment river water quality classification 1991 |
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| 460 | Further guidance on the environmental assessment of projects |
|---|
| 461 | Valuing Water Use in Scotland and Northern Ireland for WFD Implementation Purposes |
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| 462 | Contracts Department (National Rivers Authority) |
|---|
| 463 | Waterways Breeding Bird Survey Pilot Study 1998: Adaptation of BBS Census Methods to Rivers and Canals |
|---|
| 464 | The Lowermoor environment report |
|---|
| 465 | River habitats in England and Wales : a national overview : river habitat survey report no 1 |
|---|
| 466 | The utilisation of stick-pile otter holts in south east Wales |
|---|
| 467 | The River Ash : enhancement project |
|---|
| 468 | 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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| 469 | The management of the water resources of the Little Ouse groundwater unit |
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| 470 | River Yealm catchment river water quality classification 1991 |
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| 471 | Endocrine disruption horizon scanning: priority and new endocrine disrupting chemicals |
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| 472 | Programme Area reviews of research and development : report on a review of R and D in Flood Defence Operational Management (Note 355) |
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| 473 | River catchment planning guidelines report : February 1990 |
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| 474 | Development of Environmental Standards (Water Resources) Stage 3: Environmental Standards |
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| 475 | Regional water quality monitoring and surveillance programme for 1992 : quality assessment of river waters |
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