| 51 | Newby Beck Control Sub-Catchment Monthly Grab Samples |
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| 52 | The Possible effects on migratory fish in the River Dee of increased water abstraction |
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| 53 | Report on two electrofishing surveys carried out between July 10-25 1978 and July 9-12 1979 on the proposed Kielder Water
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| 54 | Analogue (nutrient), YSI, turbidity and stage data for the Wensum Demontration Test Catchment's monitoring kiosk F in 2013 |
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| 55 | Eutrophication in controlled waters in the Warwickshire Avon catchment (final report). Vol 2 : appendices |
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| 56 | National marine baseline survey 1995 : littoral cell 2 : Flamborough Head to the Wash |
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| 57 | Rivers of the Isle of Wight |
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| 58 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 59 | Derbyshire Derwent : action plan : January 1999 |
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| 60 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 61 | River Tavy catchment river water quality classification 1990 |
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| 62 | River Tamar catchment management plan : draft consultation report : 1st draft internal consultation, Cornwall area catchment planning |
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| 63 | River Camel : catchment action plan |
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| 64 | Freshwater Tamar catchment management plan : first annual review : April 1996 to March 1997 |
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| 65 | Measures for protecting upland water quality : assessment of forestry buffer strips (230/16/SW) |
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| 66 | Idle and Torne catchment management plan : first annual review November 1996 - July 1998 |
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| 67 | Urban Waste Water Treatment Directive monitoring of designated and candidate sensitive areas (eutrophic) : macrophyte survey results 1995 |
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| 68 | Upper Thames catchment management plan : action plan : August 1995 |
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| 69 | River Valency and Crackington Streams catchment river water quality classification 1991 |
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| 70 | River quality : July 1991 - June 1992 |
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| 71 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 72 | National Rivers Authority/Po River Basin Authority collaboration programme : improved monitoring systems for river water quality : comparison of experiences |
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| 73 | Study of the behaviour and impact of two sewage treatment works of the Thames catchment |
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| 74 | 1994 EC directive returns South Western region |
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| 75 | Bathing water quality in England and Wales in 1994 : report of the National Rivers Authority |
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