| 451 | Factors affecting the recruitment of riverine coarse fish: phase 3 |
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| 452 | Groundwater vulnerability of England and Wales : policy and practice for the protection of groundwater : Scale : 1 : 1 000 000 |
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| 453 | The available resource methodology : a framework for assessing water resources and abstraction availability : final report |
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| 454 | Comparison of concentration values recorded for NMP locations with Annex 1A/OSPARCOM locations |
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| 455 | Results of the NRA Welsh regional marine bioaccumulation programme 1991-1993 : SE/EAU/94/8 |
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| 456 | Results of the NRA Welsh regional marine bioaccumulation programme 1991-1995 : SE/EAU/95/9 |
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| 457 | A report on the investigation of the Taff litter problem |
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| 458 | Abandoned mines and the water environment : report of the National Rivers Authority |
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| 459 | A review of the industrial uses of continuous monitoring systems : minerals industry processes |
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| 460 | Aquatic pesticide pollution incidents in England and Wales - 1994 - 1995 |
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| 461 | Pollution incidents in England and Wales 2000 |
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| 462 | Remote sensing and baseline monitoring of the coastal waters of England and Wales 1992-1993 : a survey report [external version] |
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| 463 | Environmental impact of hypolimnial releases from Llyn Brianne |
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| 464 | Direct toxicity assessment proficiency scheme (DTAPS) : Document 1 : Issue 5 |
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| 465 | Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales |
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| 466 | The results of fish telemetry trails in the river Tawe estuary, 1991 |
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| 467 | Coastal baseline survey January/February 1995 : results |
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| 468 | Gulliver |
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| 469 | Bathing water quality : fact sheet (bilingual) : Ansawdd dwr ymdrochi : taflen ffeithiau |
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| 470 | A report of the conservation and recreation market testing project on : conservation operational advice, conservation collaborative projects, recreational collaborative projects, landscape assessment |
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| 471 | Aquatic pesticide pollution incidents in England and Wales 1992-1994 |
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| 472 | Influences of cloud cover on utility of NOAA/AVHRR imagery for snow cover monitoring over England and Wales : interim report (207/2/N) |
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| 473 | Algal growth in the impounded waters of a proposed barrage at Cardiff Bay : prediction using 1989 data |
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| 474 | Afan and Kenfig catchment management plan : action plan : March 1996 |
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| 475 | Cleddau catchment management plan : action plan : 1995 |
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