1 | The effect of the voluntary initiative on water quality |
2 | The influence of zinc sulphate solution on the fauna of chalk stream channels
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3 | Impact of the signal crayfish Pacifastacus leniusculus and its associated crayfishery on the River Thame |
4 | Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species |
5 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
6 | Quality audit of biological samples for the 1990 river quality survey |
7 | The quality of rivers in England and Wales (1990 to 1995) |
8 | The 1990 river and estuary classification survey of England and Wales |
9 | Biological water quality monitoring in the Midlands region |
10 | An audit of performance in the primary analysis of standard biological macro-invertebrate samples in 2001 : Environment Agency CEH Report Ref: COO 158/23 |