6951 | Herbarium Image: Elodea sp. |
6952 | Herbarium Image: Carex aquatilis |
6953 | Herbarium Image: Persicaria amphibia |
6954 | Herbarium Image: Persicaria amphibia |
6955 | Herbarium Image: Persicaria hydropiper |
6956 | Herbarium Image: Eleocharis palustris |
6957 | Herbarium Image: Persicaria amphibia |
6958 | Herbarium Image: Schoenoplectus lacustris |
6959 | Herbarium Image: Schoenoplectus tabernaemontani |
6960 | Best Management Practices to Reduce Diffuse Pollution from Agriculture |
6961 | A report on the use of pesticides at two Hampshire watercress farms |
6962 | A field guide to the British seaweeds : as required for assistance in the classification of water bodies under the Water Framework Directive |
6963 | Radiation Experiments on Aquatic Organisms |
6964 | Impact Of Conifer Harvesting And Replanting On Upland Water Quality |
6965 | Porth, Gluvian and Menalhyl catchment river water quality classification 1990 |
6966 | River Cober catchment river water quality classification 1991 |
6967 | River Fal catchment river water quality classification 1990 |
6968 | Fact sheet for the RBCA tool kit for chemical releases |
6969 | River Fal catchment river water quality classification 1991 |
6970 | River Par and Crinnis catchment river water quality classification 1990 |
6971 | River Par and Crinnis catchment river water quality classification 1991 |
6972 | St Austell River and south Cornwall coastal streams catchment river water quality classification 1990 |
6973 | The identification and investigation of a dinoflagellate bloom in Mounts Bay, Cornwall |
6974 | A draft code of practice for analytical quality control in National Rivers Authority laboratories |
6975 | Control samples for ph determination in low ionic strength waters |