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451Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals
452Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918
453The influence of agriculture on the quality of natural waters in England and Wales
454The physical character of rivers and streams in the UK and Isle of Man
455The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998
456Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme
457The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990
458The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
459A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
460A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
461The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
462An investigation into the effects of Alton sewage works on the River Wey North
463Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
464The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
465Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
466Protecting your future : tackling flooding in the Thames Estuary through the 21st century
467The land-use planning system and the Water Framework Directive (can't read barcode)
468Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
469A 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
470Responses 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
471Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
472A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
473Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
474Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
475Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority