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476Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
477A brief history of the River Stour navigation : 1705 to the present day
478The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
479Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
480Protecting your future : tackling flooding in the Thames Estuary through the 21st century
481The land-use planning system and the Water Framework Directive (can't read barcode)
482The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
483Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
484Report for Anglian Water, NRA Unit on the uses of the Orwell and the Stour Estuaries and the use of the mathematical model to derive long term consent limits for all inputs to Orwell Estuary
485A review of the use of multifunction wardens in the Devon Area of the South Western Region of the National Rivers Authority, with particular reference to their use within the fisheries function
486Responses to 'Outlook for the environment' : a summary of the responses to the Environment Agency's consulation on the priorities for investment by water companies in environmental improvements as part of the Periodic Review
487Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
488A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
489Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
490Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
491Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
492East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
493Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
494Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
495Report 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
496A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
497The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update
4981995 drought report : a report on the severity of the drought of 1995 and its effect in the Severn and Trent catchments
499Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS)
500The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates