| 476 | Ely catchment management plan : action plan (bilingual) : 1995 |
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| 477 | Eurwg catchment management plan : phase 1 : Statement of Catchment Uses and Problems Identification |
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| 478 | Eurwg catchment management plan : phase 2 : resolution of catchment problems |
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| 479 | Glaslyn, Dwyryd, Artro catchment management plan : action plan : bilingual version, 1996 |
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| 480 | River Clwyd catchment management plan : action plan (bilingual) : Cynllun Rheoli Dalgylch Afon Clwyd Cynllun Gweithredu |
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| 481 | River Dee catchment management plan : action plan (bilingual) : 1996: Cynllun Gweithrediad Cynllun Rheoli Dalgylch Dyfrdwy 1996 |
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| 482 | River Taff catchment management plan : action plan (bilingual) : 1996 |
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| 483 | Further Validation of PHABSIM for the Habitat Requirements of Salmonid Fish |
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| 484 | Llyn Tegid dual pumping scheme : preliminary study report |
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| 485 | Assessment of low flow conditions : phase 1 - proposed methodology. Final report |
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| 486 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 487 | A litter assessment of two major tributaries of the Taff, the Cynon and the Rhondda : surveyed March - April 1990 |
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| 488 | Sea Empress oil spill, February 1996 : overview of surveillance activities : draft |
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| 489 | Acid waters in Wales : appraisal of strategic options : draft report |
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| 490 | Herbarium Image: Carex arenaria |
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| 491 | Radiation Experiments on Aquatic Organisms |
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| 492 | Developing Quality Assurance for Fish Counter Data - Phase 1: An Assessment of the Salmonid Fish Counter Network in England and Wales |
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| 493 | STREAM thematic network : standards, measurement, testing and research in environmental instrumentation and monitoring |
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| 494 | Atlantic Salmon Trust Winter Journal 2005/2006 |
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| 495 | An evaluation of discharge and consent compliance policy : a blueprint for the future |
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| 496 | An evaluation of discharge and consent compliance policy : a blueprint for the future : letters from respondents |
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| 497 | An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06 |
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| 498 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 499 | Study of ferruginous minewater impacts in Wales : phase 2a determination of remedial options : volume 2 : site reports |
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| 500 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
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