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51Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918
52The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998
53The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
54Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
55Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
56Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
57The effects of ammonia in discharges from Hogsmill Valley sewage treatment works on the water quality of the River Thames at Teddington
58Meiofaunal assemblages of the Thames Estuary, April 1989-March 1990 : modules I-III : a study of the meiofaunal communities present in sediment samples collected by the National Rivers Authority, Thames Region
59(3) The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England;
60Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season
61Guidance notes for local planning authorities on the methods of protecting the water environment through development plans
62The development of biomanipulation techniques and control of phosphorus release from sediments (475/1/A) : LIFE project : restoration of the Norfolk Broads
63Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994
64Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996
65An assessment of the impact of Berkhamsted and Maple Lodge STWs on the Grand Union canal based on macroinvertebrate surveys
66A report on the infaunal communities within Weston Bay in relation to the sewage outfall at Black Rock
67Health effects of sea bathing (WMI 9021) - Phase III final report to the Department of the Environment
68Procedure for quality assurance for RIVPACS compatible macro-invertebrate samples analysed to the taxonomic level needed for the BMWP-score system
69An audit of performance in the AQC inspection of standard biological macro-invertebrate samples in 2002 : The Environment Agency (C00158/31)
70Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests
71A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 1 : final draft
72The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England;
73The River Eden Demonstration Test Catchment (DTC) Data
74Environmental snapshot for the East of England [version 1]
75Disturbing the season's due: plankton periodicity in Grassmere, 1987