| 401 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
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| 402 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
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| 403 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 404 | Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals |
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| 405 | The influence of agriculture on the quality of natural waters in England and Wales |
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| 406 | The physical character of rivers and streams in the UK and Isle of Man |
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| 407 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
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| 408 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
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| 409 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
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| 410 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
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| 411 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
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| 412 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 413 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
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| 414 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
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| 415 | An investigation into the effects of Alton sewage works on the River Wey North |
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| 416 | A brief history of the River Stour navigation : 1705 to the present day |
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| 417 | The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish |
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| 418 | Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority |
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| 419 | Protecting your future : tackling flooding in the Thames Estuary through the 21st century |
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| 420 | The land-use planning system and the Water Framework Directive (can't read barcode) |
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| 421 | A review of the use of multifunction wardens in the Devon Area of the South Western Region of the National Rivers Authority, with particular reference to their use within the fisheries function |
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| 422 | Responses to 'Outlook for the environment' : a summary of the responses to the Environment Agency's consulation on the priorities for investment by water companies in environmental improvements as part of the Periodic Review |
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| 423 | Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group |
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| 424 | Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements |
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| 425 | Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority |
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