| 526 | Quality audit of biological samples for the 1990 river quality survey |
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| 527 | Policy and practice for the protection of groundwater : summary document |
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| 528 | A review of the optimum accuracy of flow and rainfall forecasting |
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| 529 | The quality of rivers in England and Wales (1990 to 1995) |
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| 530 | The National Centre for Environmental Data and Surveillance : business plan 1999/2000 |
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| 531 | The influence of variations in reedswamp structure and extent upon macroinvertebrates |
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| 532 | A map illustrating the locations of litter collection and litter bag installation |
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| 533 | A Catalogue for the FBA Collection of Freshwater Macroinvertebrates |
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| 534 | A strategic approach to the consideration of environmental harm |
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| 535 | Green Household Index. The Eco-Cal Background Information |
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| 536 | Enhancing the environment : 20 case studies in London |
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| 537 | Doses from the consumption of Cardiff Bay flounder containing organically-bound tritium |
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| 538 | A guide to the National Centre for Risk Analysis and Options Appraisal |
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| 539 | An environmental vision : the Environment Agency's contribution to sustainable development |
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| 540 | Policy and practice for the protection of groundwater |
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| 541 | Policy and practice for the protection of groundwater - NRA leaflet |
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| 542 | Discharge consent and compliance policy : a blueprint for the future |
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| 543 | An interim report on the coastwatch bioaccumulation programme : metals |
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| 544 | The fuel additive MTBE - a groundwater protection issue? |
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| 545 | EC directives and the control of water pollution : fact file |
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| 546 | Policy and practice for the protection of groundwater : draft for consultation |
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| 547 | Policy and practice for the protection of groundwater |
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| 548 | Cryptosporidium in river waters: inception of the study |
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| 549 | Swords water quality study - phase 1 : water quality of the Thames |
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| 550 | Protection of the Water Environment using Balancing Facilities |
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