| 51 | A report on the 1993 strategic stock assessment survey of the Eamont catchment with particular reference to salmonid fish |
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| 52 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 2000 - 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 assessment of cormorant depredation on stillwater coarse fish populations in the Lea and Colne valleys of the Thames catchment |
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| 55 | A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids |
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| 56 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000 |
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| 57 | Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season |
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| 58 | A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids |
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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 | An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment |
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| 61 | Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment |
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| 62 | 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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| 63 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
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| 64 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
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| 65 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |
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| 66 | The 1990 river and estuary classification survey of England and Wales |
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| 67 | Operational mechanisms for the protection and enhancement of headwaters |
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| 68 | The development and verification of methodologies for defining groundwater nitrate vulnerable zones |
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| 69 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 70 | Identification of water quality problems in the Strat and Neet catchments |
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| 71 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
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| 72 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
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| 73 | The National Rivers Authority employee attitude survey : summary |
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| 74 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
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| 75 | Second Coniston OS map related to the Seismic Survey 1983 |
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