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451Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
452A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
453Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
454Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
455East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
456Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
457Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
458Report on the national marine analytical quality control scheme 1992/93 (MPMMG 93/12) : presented to the October 1993 meeting of the Marine Pollution Monitoring Management Group
459A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
460The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update
4611995 drought report : a report on the severity of the drought of 1995 and its effect in the Severn and Trent catchments
462Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS)
463The Movements of Atlantic Salmon (Salmo salar L.) and Sea Trout (Salmo trutta L.) Smolts in the Impounded Estuary of the R.Tawe, South Wales
464The effects of water resources management on the rivers Bure, Wensum and Nar in North Norfolk : Final project report to the National Rivers Authority. July 1994
465The 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
466The effects of ammonia in discharges from Hogsmill Valley sewage treatment works on the water quality of the River Thames at Teddington
467Audit 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
468Measures to safeguard public water supplies : a second report to the Secretary of State for the Environment on the drought of 1995
469Preliminary assessment of the ability of Restormel fish counter to enumerate the passage of migratory salmonids on the River Fowey : Cornwall Area Fisheries Science Team
470The 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
471Report on the results of a comparison of data from two surveys of the microfauna of the wash carried out in 1991 and 1993
472Factual report on the boreholes and installation of standpipes for the combined investigations in connection with the East Ruston common SSSI Alleviation Scheme
473A 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
474Inferences on the pollution status of the Thames estuary from the macrobenthic community structure : National Rivers Authority Thames Region, Biology, Thames Estuary Benthic Programme
475A 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