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6726A survey of ferruginous minewater impacts in the Welsh coalfields
6727A simple key to canal water quality using a biological technique
6728Investigations into the status of fisheries, biological and water quality in the River Pelenna catchment, prior to the treatment of discharges from abandoned coal mines : PL/EAW/95/3
6729NRA Welsh Region South West Area Minewaters Workshop, 23 May 1995, Swansea : summary report
6730The impact of ferruginous minewater break-outs on the environmental quality of the Rivers Rhymney, Ebbw and Sirhowy : summary report
6731A survey of ferruginous minewater impacts in the Welsh coalfields
6732Dioxins and the River Doe Lea : plain English report
6733A review of the industrial uses of continuous monitoring systems : incineration processes : a report produced for NCCA and ETSU by Entec
67341994 general quality assessment (GQA) Cornwall area
6735Kennet catchment : time of travel studies final report
6736Chlorohyll and Phosphorus Classifications for UK Lakes
6737Investigating the feasibility of using neural networks to derive chlorophyll a prediction algorithms for case 2 waters
6738Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report
6739Herbarium Image: Phalaris arundinacea
6740Herbarium Image: Orobanche elatior
6741An appraisal of the options for the structure of the water resources function in Thames Region NRA
6742Grey tide against green marsh : sea defences in East Anglia : synopsis of proceedings of conference held at Snape on 1st November 1991
6743Hampshire salmon seminar 5th October 1993
6744Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000
6745Chemical river quality 1993-1995 according to the general quality assessment (GQA) scheme [map] : scale 1 : 750 000
6746An investigation into bathing water quality at Millendreath
6747Guide to groundwater vulnerability mapping in England and Wales
6748Investigation of existing conservation interests and potential furtherance opportunities
6749Locations of licensed abstractions and hydrometric stations
6750NRA regional, area and catchment boundaries