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426The physical character of rivers and streams in the UK and Isle of Man
427Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme
428Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report
429The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
430The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
431A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
432A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
433The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
434An investigation into the effects of Alton sewage works on the River Wey North
435Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
436A brief history of the River Stour navigation : 1705 to the present day
437The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
438Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
439Protecting your future : tackling flooding in the Thames Estuary through the 21st century
440The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
441Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
442Report 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
443Responses 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
444Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
445A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
446Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
447Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
448Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
449East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
450Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme