| 526 | River Tavy EC Freshwater Fish Directive failure 1993 |
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| 527 | North West Norfolk catchment management plan : action plan : November 1995 |
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| 528 | Ouse Washes : barrier banks improvements |
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| 529 | Planning for the rising tides - the Humber Estuary - consultation on managed realignment: information for the landowners and tenants - June 2002 |
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| 530 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 531 | Poole Harbour and Purbeck catchment management plan : first annual review |
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| 532 | Flood defence (NRA Severn-Trent 59)
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| 533 | Disposal of Cut Vegetation: Best Practice Guidelines |
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| 534 | Management of Vegetation on Raised Embankments |
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| 535 | Saltmarsh Change in England and Wales: Its History and Causes |
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| 536 | Development of design method for straight compound channels. Volume 2 : detailed development of design method : part 2 : appendices (252/1/T) |
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| 537 | An Investigation of Ecological Change in the Rivers Kennet and Lambourn |
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| 538 | Assessment of estuarine/marine water quality using benthic macroinvertebrates : standard methodologies : final draft : biology laboratory procedures manual. Section C : test methods and procedures |
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| 539 | Biological survey report - Chess catchment, June-Oct 1992 |
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| 540 | Redd count report 1993 |
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| 541 | Modelling seepage and groundwater flows from natural and replenished beaches : operational investigation 582 (anglian region) |
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| 542 | Aquatic Weed Control Operation - Best Practice Guidelines |
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| 543 | Controlling the inputs of persistent chemical to marine waters from land-based sources |
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| 544 | National Centre for Toxic and Persistent Substances : business case |
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| 545 | Heavy metal contaminants in fish caught from the Mersey Estuary and inshore Liverpool Bay |
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| 546 | Wheal Jane : a clear way forward |
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| 547 | Anglian region state of the environment report : the IPC perspective |
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| 548 | Catchment management plan : South Essex action plan, June 1996 |
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| 549 | Aerial spraying with asulam to control bracken : guidance notes for Environment Agency staff |
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| 550 | An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley |
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