| 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 | A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids |
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| 53 | An assessment of the impact of Berkhamsted and Maple Lodge STWs on the Grand Union canal based on macroinvertebrate surveys |
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| 54 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
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| 55 | An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment |
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| 56 | Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season |
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| 57 | An estimated map of NO2 concentration in the Midlands region : a report produced for the Environment Agency |
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| 58 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
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| 59 | 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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| 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 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 2 : final draft |
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| 62 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 63 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
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| 64 | Summary of monitoring activities on the blackwater estuary |
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| 65 | Second Coniston OS map related to the Seismic Survey 1983 |
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| 66 | Coniston OS map related to the Seismic Survey 1983 |
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| 67 | A survey of trace metals in biota of the Mersey estuary 1993 |
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| 68 | The River Colne Estuary subtidal biological survey 1992 |
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| 69 | Swords water quality study - phase 1 : water quality of the Thames |
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| 70 | Report on the quality of bathing waters 1990 |
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| 71 | A report on the River Chew at Chewton Mendip, 6th August 1992 |
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| 72 | Fisheries of the middle and lower Wylye and factors affecting their performance |
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| 73 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 74 | The Ribble Estuary 1992 surveys : summary of results |
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| 75 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
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