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451An investigation into the effects of Alton sewage works on the River Wey North
452Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
453A brief history of the River Stour navigation : 1705 to the present day
454The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
455Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
456Protecting your future : tackling flooding in the Thames Estuary through the 21st century
457The land-use planning system and the Water Framework Directive (can't read barcode)
458The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
459Report 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
460A 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
461Responses 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
462Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
463A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
464Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
465Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
466Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
467East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
468Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
469Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
470Report 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
471A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
472The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update
473Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS)
474The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates
475The Movements of Atlantic Salmon (Salmo salar L.) and Sea Trout (Salmo trutta L.) Smolts in the Impounded Estuary of the R.Tawe, South Wales