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426The physical character of rivers and streams in the UK and Isle of Man
427The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998
428Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme
429The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990
430Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report
431The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
432The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
433A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
434A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
435A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990
436The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
437An investigation into the effects of Alton sewage works on the River Wey North
438Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
439A brief history of the River Stour navigation : 1705 to the present day
440The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
441Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
442Protecting your future : tackling flooding in the Thames Estuary through the 21st century
443The land-use planning system and the Water Framework Directive (can't read barcode)
444The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
445Report 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
446A 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
447Responses 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
448Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
449A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
450Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species