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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
581The Louth coastal catchment management plan : final report
582Draft protocol for the derivation of Toxicity Based Consents
583The Loddon catchment, Thames : recommendations for statutory water quality objectives
584Second Coniston OS map related to the Seismic Survey 1983
585Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
586Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
587Coniston OS map related to the Seismic Survey 1983
588Uses of the water environment: factsheet number six
589River basin planning and the Water Framework Directive
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
594A natural assets register for the Sankey catchment. Volume 2
595Data mining of calculations for the control of emissions of organic compounds
596Bacteriological monitoring of freshwater rivers in the Thames Region 1995
597Environmental protection and pollution control : in the North West
598Buckingham flood defence improvements : presentation of the preferred option
599Impact of breakwaters on the water quality of Sidmouth beach
600Bass fishing in the Fal estuary and coastal area