| 51 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
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| 52 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2001 |
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| 53 | Investigation into the 1999 failure of the European Community bathing waters directive at Teignmouth Town Beach (2001) |
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| 54 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 1998-March 1999 |
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| 55 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
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| 56 | An assessment of cormorant depredation on stillwater coarse fish populations in the Lea and Colne valleys of the Thames catchment |
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| 57 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 2 : final draft |
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| 58 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
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| 59 | An assessment of the impact of Berkhamsted and Maple Lodge STWs on the Grand Union canal based on macroinvertebrate surveys |
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| 60 | A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids |
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| 61 | A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids |
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| 62 | The Use Of DNA Fingerprinting To Study The Population Dynamics Of Otters (Lutra Lutra) In Southern Britiain - A Feasibility Study |
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| 63 | Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment |
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| 64 | Time of travel for the Greadon Farm pollution incident on the Upper Torridge of 19th August 1997 (1997) |
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| 65 | An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment |
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| 66 | 'Sea Vigil' water quality monitoring : the East coast 1992-1993 |
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| 67 | The 1990 river and estuary classification survey of England and Wales |
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| 68 | Results of the NRA Welsh regional marine bioaccumulation programme 1991-1993 : SE/EAU/94/8 |
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| 69 | The development and verification of methodologies for defining groundwater nitrate vulnerable zones |
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| 70 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 71 | Summary of monitoring activities on the blackwater estuary |
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| 72 | Fisheries of the middle and lower Wylye and factors affecting their performance |
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| 73 | The River Colne Estuary subtidal biological survey 1992 |
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| 74 | Report on the quality of bathing waters 1990 |
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| 75 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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