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576The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
577The National Rivers Authority employee attitude survey : summary
578The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
579Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
580Pesticides in the aquatic environment 1997 : executive summary
581Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
582The Louth coastal catchment management plan : final report
583The Loddon catchment, Thames : recommendations for statutory water quality objectives
584Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
585Second Coniston OS map related to the Seismic Survey 1983
586Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
587Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
588Coniston OS map related to the Seismic Survey 1983
589Uses of the water environment: factsheet number six
590First annual review of the River Exe catchment management plan
591First annual review of the Taw/Torridge estuary catchment management plan (1996)
592Flood alleviation proposals for Bakewell and Ashford in the Water
593(Bilingual) Assessing the impact of dewatering on water resources
594Biological water quality monitoring in the Midlands region
595A natural assets register for the Sankey catchment. Volume 2
596Data mining of calculations for the control of emissions of organic compounds
597Bacteriological monitoring of freshwater rivers in the Thames Region 1995
598Environmental protection and pollution control : in the North West
599Buckingham flood defence improvements : presentation of the preferred option
600Impact of breakwaters on the water quality of Sidmouth beach