| 51 | Effects of agricultural soil erosion on watercourses |
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| 52 | Development of marine phytoplankton methodology and quality assurance procedures : second draft |
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| 53 | Report on the quality of bathing waters 1990 |
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| 54 | Distribution of PCDDS an PCDFS in surface freshwater systems draft final report R and D Project 330 |
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| 55 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk B |
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| 56 | Helford Estuary Gweek Quay sediment quality data report |
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| 57 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 58 | Marine phytoplankton : standard methodologies: final draft : biology laboratory procedures manual. Section C : test methods and procedures |
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| 59 | Quality audit of biological samples for the 1990 river quality survey |
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| 60 | Water quality investigations at Nancekuke, Cornwall |
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| 61 | Silloth sediment survey : April, July 1990 |
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| 62 | Investigating the Applicability of Passive Sampling Devices to Pesticide Monitoring |
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| 63 | Devon area internal report - the kingsbridge estuary - survey of the benthic microinvertebrate infauna (october 1990) for the proposed classification of estuaries in the south western region |
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| 64 | Regional water quality monitoring and surveillance programme for 1992 : quality investigations in controlled waters |
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| 65 | Operational mechanisms for the protection and enhancement of headwaters |
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| 66 | Heavy metals, polychlorinated biphenyl and organochlorine pesticide residues in European eels anguilla anguilla L. from Sussex rivers - appendices : draft : part II |
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| 67 | Quantification of trace components in landfill gas |
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| 68 | National coastal baseline survey (Final draft) : 1993, 1994 and 1995 |
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| 69 | Pesticide residues in fish taken from the Newlyn River (1992) |
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| 70 | Physical environment for river invertebrate communities : project report : annex (data) |
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| 71 | Lake Benthic Macroinvertebrates 2: Quantifying Uncertainty in Sampling Methodology |
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| 72 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 73 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
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| 74 | The Effectiveness of Liners in Inhibiting the Migration of Landfill Gas |
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| 75 | Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region |
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