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6751Salmon Migration and River Flow - Results of Salmon Radio Tracking Studies on Six Rivers in South West England: Technical Summary
6752Environmental quality standards to protect identified uses of controlled waters
6753Mount's Bay and Lands End streams catchment river water quality classification 1991
6754Herbarium Image: Luzula pilosa
6755Herbarium Image: Tofieldia pusilla
6756Herbarium Image: Luzula spicata
6757Herbarium Image: Tofieldia pusilla
6758Herbarium Image: Carex bigelowii
6759Herbarium Image: Carex arenaria
6760Herbarium Image: Elodea sp.
6761Herbarium Image: Carex aquatilis
6762Herbarium Image: Persicaria amphibia
6763Herbarium Image: Persicaria amphibia
6764Herbarium Image: Persicaria hydropiper
6765Herbarium Image: Eleocharis palustris
6766Herbarium Image: Persicaria amphibia
6767Herbarium Image: Schoenoplectus lacustris
6768Herbarium Image: Schoenoplectus tabernaemontani
6769Best Management Practices to Reduce Diffuse Pollution from Agriculture
6770A report on the use of pesticides at two Hampshire watercress farms
6771A field guide to the British seaweeds : as required for assistance in the classification of water bodies under the Water Framework Directive
6772Radiation Experiments on Aquatic Organisms
6773Porth, Gluvian and Menalhyl catchment river water quality classification 1990
6774River Cober catchment river water quality classification 1991
6775River Fal catchment river water quality classification 1990