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401The physical character of rivers and streams in the UK and Isle of Man
402The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998
403Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme
404The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
405The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
406A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
407A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
408The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
409An investigation into the effects of Alton sewage works on the River Wey North
410Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
411A brief history of the River Stour navigation : 1705 to the present day
412The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
413Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
414The land-use planning system and the Water Framework Directive (can't read barcode)
415The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
416Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
417Report 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
418Responses 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
419Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
420Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
421Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
422Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
423East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
424Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
425Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme