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451The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
452A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
453A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
454A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990
455The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
456An investigation into the effects of Alton sewage works on the River Wey North
457Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
458A brief history of the River Stour navigation : 1705 to the present day
459The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
460Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
461Protecting your future : tackling flooding in the Thames Estuary through the 21st century
462The land-use planning system and the Water Framework Directive (can't read barcode)
463The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
464Report 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
465A 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
466Responses 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
467Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
468A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
469Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
470Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
471Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
472East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
473Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
474Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
475Report 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