| 501 | Definition of the Extent and Vertical Range of Saltmarsh |
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| 502 | Method for assessing the heritage value of net fisheries |
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| 503 | An Investigation of Ecological Change in the Rivers Kennet and Lambourn |
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| 504 | Alternative Methods For The Biological Classification Of Rivers |
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| 505 | Factors affecting the recruitment of riverine coarse fish: phase 3 |
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| 506 | Medway Estuary fisheries survey 2000 : (incorporating the report for 1997 to 2000) |
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| 507 | Land Use and Fisheries Report of the Pilot Study |
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| 508 | A Review of the Brogboroughand Landfill 2000 Test Cells Monitoring Data |
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| 509 | Assessment of the distribution of Bembidion testaceum and reasons for its decline |
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| 510 | The Identification of Oestrogenic Effects in Wild Fish - Phase II |
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| 511 | Attenuation of nitrate in the sub-surface environment |
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| 512 | Ecotoxicology : a report of the NRA R and D Ecotoxicology Group |
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| 513 | Guardians of the water environment (NRA Thames Region) |
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| 514 | What's happening in the Midlands region : looking at our environment |
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| 515 | Wyre estuary shoreline management plan : the Environment Agency's contribution to sustainable development |
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| 516 | Audit report on the 1995 GQA biological survey |
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| 517 | Final report of the Stock Assessment Task Group |
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| 518 | A report on the use of pesticides at two Hampshire watercress farms |
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| 519 | Fact sheet for the RBCA tool kit for chemical releases |
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| 520 | Some guidance on the use of digital environmental data |
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| 521 | Assessing and controlling the ecotoxicity of complex effluents |
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| 522 | Charging for discharges scheme : guidance to the power generation industry |
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| 523 | Narrowboats on the Thames : useful hints and tips |
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| 524 | Air dispersion climate from the Castle Cement works at Ribblesdale |
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| 525 | Pesticide residues in fish taken from the Newlyn River (1992) |
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