| 51 | Method for the assessment of river water quality using benthic macroinvertebrates |
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| 52 | An ecological study of the effects of ferric dosing on the plankton and benthic invertebrates of Grafham Water between May 1990 and November 1991 |
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| 53 | Investigation to determine the cause of the long-term BOD failure at Higher Weaver routine monitoring site (70532960) for 1995 and 1997 |
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| 54 | Results of the oyster (Crassostrea gigas) embryo-larval biassay on samples taken during the winter phase of national maritime monitoring programme 1997 : interim report |
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| 55 | Quantification of the relationship between effluent quality and biological quality : interim report for stage 1 |
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| 56 | Guidance on the Development of Typology and Classification Systems for Transitional and Coastal Waters |
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| 57 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 58 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
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| 59 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 60 | Biological report of the 1991 coastal and estuarine survey from Crosby to Glasson |
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| 61 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : primary audit |
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| 62 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : AQC audit |
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| 63 | Biological report of the 1992 coastal and estuarine survey from Crosby to Glasson |
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| 64 | Environment Agency Kent area : the Seabrook stream : BSc (Hons) Environmental biology placement report |
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| 65 | The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report |
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| 66 | Analysis of natural and polluted river communities in Great Britain- Progress report for the period April 1984- March 1988
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| 67 | Torridge data report : biological monitoring of organic inputs to the study catchments using rapid biological assessment keys |
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| 68 | Thames estuary benthic programme : a site by site report on the results of macroinvertebrate surveys undertaken during 1990-91 |
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| 69 | An audit of performance in the primary analysis of standard biological macro-invertebrate samples in 2001 : Environment Agency CEH Report Ref: COO 158/23 |
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