51 | Quantification of the relationship between effluent quality and biological quality : interim report for stage 1 |
52 | Biological report of the 1992 coastal and estuarine survey from Crosby to Glasson |
53 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
54 | Biological report of the 1991 coastal and estuarine survey from Crosby to Glasson |
55 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : AQC audit |
56 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : primary audit |
57 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
58 | Analysis of natural and polluted river communities in Great Britain- Progress report for the period April 1984- March 1988
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59 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
60 | Thames estuary benthic programme : a site by site report on the results of macroinvertebrate surveys undertaken during 1990-91 |
61 | An audit of performance in the primary analysis of standard biological macro-invertebrate samples in 2001 : Environment Agency CEH Report Ref: COO 158/23 |