1 | Clouding: the issue. An appraisal of the effects of turbidity in aquatic systems |
2 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
3 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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4 | National marine baseline survey 1995 : littoral cell 7 : Lands End to the Severn Estuary |