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451Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
452Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
453A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
454The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update
4551995 drought report : a report on the severity of the drought of 1995 and its effect in the Severn and Trent catchments
456Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS)
457The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates
458The Movements of Atlantic Salmon (Salmo salar L.) and Sea Trout (Salmo trutta L.) Smolts in the Impounded Estuary of the R.Tawe, South Wales
459The new waterlands? Proceedings of a one day seminar organised by the Sussex Wildlife Trust as part of the RSNC Wildlife Trusts Parnership Water For Wildlife campaign
460The effects of ammonia in discharges from Hogsmill Valley sewage treatment works on the water quality of the River Thames at Teddington
461Audit surveys in the NRA Thames region : a report on the surveys carried out in 1992/93 to assess the retention and enhancement of wildlife habitats during routine dredging operations
462Measures to safeguard public water supplies : a second report to the Secretary of State for the Environment on the drought of 1995
463Preliminary assessment of the ability of Restormel fish counter to enumerate the passage of migratory salmonids on the River Fowey : Cornwall Area Fisheries Science Team
464The Movements of Salmon (Salmo salar L.) and Sea Trout (Salmo trutta L.) Smolts in the Lower River and Estuary of the River Conwy, North Wales
465Factual report on the boreholes and installation of standpipes for the combined investigations in connection with the East Ruston common SSSI Alleviation Scheme
466A study of the mayfly parasite Spiriopsis adipophila, Arvy and Peters (1972) (=Sprininella adipophila, Arvy and Delage 1966) in Ephemera danica from the River Pang, a tributary of the River Thames
467A review of available information sources for assessing the hazards and risks of chemical substances in the environment. Final report : recommendations for the acquistion of certain sources of environmental data
468Warming to the idea : meeting the challenge of climate change in the South West : summary report : south west region climate change impacts scoping study
469A field guide to the British seaweeds : as required for assistance in the classification of water bodies under the Water Framework Directive
470Assessment of Ivybridge mobile monitoring station and investigation of the water quality of the River Erme and the effect of Ivybridge Sewage Treatment works final effluent
471Investigations 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
472Recorded data from the Black Bridge weather station (weather station 2) in the Wensum Catchment between 2010-2011
473The behaviour of adult salmon (Salmo salar L.) in the River Tay as determined by radio telemetry
474Darwell Transfer Scheme. Final Report Part II. Location of the draw-off tower in the Darwell Reservoir
475Recorded data from the Black Bridge weather station (weather station 2) in the Wensum Catchment between 2013-2014