76 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
77 | Analysis of natural and polluted river communities in Great Britain- Progress report for the period April 1984- March 1988
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78 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
79 | Torridge data report : biological monitoring of organic inputs to the study catchments using rapid biological assessment keys |
80 | Thames estuary benthic programme : a site by site report on the results of macroinvertebrate surveys undertaken during 1990-91 |
81 | An audit of performance in the primary analysis of standard biological macro-invertebrate samples in 2001 : Environment Agency CEH Report Ref: COO 158/23 |