| 4551 | Benefit Assessment of Water Quality Improvements |
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| 4552 | Works in, near or liable to affect watercourses |
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| 4553 | Extended Flow Records At Key Locations In England And Wales (Phase 2) |
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| 4554 | Somerset Levels and Moors water level management and nature conservation |
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| 4555 | Protecting and improving the water environment : model policies |
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| 4556 | Post mortem study of otters in England and Wales 1992-2003 |
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| 4557 | The evaluation of a LTH BOM 1 hand-held dissolved oxygen meter (220/25/T) |
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| 4558 | Remedial Treatment Action Data Sheets. Version 1.0 |
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| 4559 | Freshwater biological indicators of pesticide contamination |
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| 4560 | Surface water quality 1990 |
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| 4561 | Evaluating The Benefits Of Hydrometric Networks |
|---|
| 4562 | National Rivers Authority drivers handbook : October 1991, issue 1 |
|---|
| 4563 | Manual of investment appraisal |
|---|
| 4564 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 4565 | Regional water resources strategy : Severn-Trent region |
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| 4566 | Guidance notes for local planning authorities on the methods of protecting the water environment through development plans |
|---|
| 4567 | Flood defence guidance for conservation in watercourse maintenance works |
|---|
| 4568 | Interpretation Of Optimisation In The Context Of A Disposal Facility For Long-Lived Radioactive Waste |
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| 4569 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
|---|
| 4570 | Upper Thames catchment management plan consultation report (draft) November 1994 |
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| 4571 | East Devon public water supply strategy : Exe freshwater model - QUASAR validation/calibration |
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| 4572 | River Medway catchment management plan : phase 1 |
|---|
| 4573 | Risk Assessment Methodology for Determining Nutrient Impacts in Surface Freshwater Bodies |
|---|
| 4574 | MASQ: Monitoring and Assessing Soil Quality in Great Britain. Countryside Survey Module 6: Soils and Pollution |
|---|
| 4575 | Phytoplankton Classification tool for UK Lakes |
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