| 5451 | Herbarium Image: Persicaria amphibia |
|---|
| 5452 | Herbarium Image: Persicaria hydropiper |
|---|
| 5453 | Herbarium Image: Eleocharis palustris |
|---|
| 5454 | Herbarium Image: Persicaria amphibia |
|---|
| 5455 | Herbarium Image: Schoenoplectus lacustris |
|---|
| 5456 | Herbarium Image: Schoenoplectus tabernaemontani |
|---|
| 5457 | A report on the use of pesticides at two Hampshire watercress farms |
|---|
| 5458 | A field guide to the British seaweeds : as required for assistance in the classification of water bodies under the Water Framework Directive |
|---|
| 5459 | Radiation Experiments on Aquatic Organisms |
|---|
| 5460 | Porth, Gluvian and Menalhyl catchment river water quality classification 1990 |
|---|
| 5461 | River Cober catchment river water quality classification 1991 |
|---|
| 5462 | River Fal catchment river water quality classification 1990 |
|---|
| 5463 | Fact sheet for the RBCA tool kit for chemical releases |
|---|
| 5464 | River Fal catchment river water quality classification 1991 |
|---|
| 5465 | River Par and Crinnis catchment river water quality classification 1990 |
|---|
| 5466 | River Par and Crinnis catchment river water quality classification 1991 |
|---|
| 5467 | St Austell River and south Cornwall coastal streams catchment river water quality classification 1990 |
|---|
| 5468 | A draft code of practice for analytical quality control in National Rivers Authority laboratories |
|---|
| 5469 | Control samples for ph determination in low ionic strength waters |
|---|
| 5470 | Cryptosporidium in drinking water : survey of occurrence. June 1991 |
|---|
| 5471 | River Cober catchment river water quality classification 1990 |
|---|
| 5472 | Developing Quality Assurance for Fish Counter Data - Phase 1: An Assessment of the Salmonid Fish Counter Network in England and Wales |
|---|
| 5473 | Quality assurance for phytoplankton data |
|---|
| 5474 | STREAM thematic network : standards, measurement, testing and research in environmental instrumentation and monitoring |
|---|
| 5475 | Annual N2O measurements and associated data: AC0213, Devon, 2012 |
|---|
