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451A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
452A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990
453The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
454An investigation into the effects of Alton sewage works on the River Wey North
455Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
456A brief history of the River Stour navigation : 1705 to the present day
457The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
458Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
459Protecting your future : tackling flooding in the Thames Estuary through the 21st century
460The land-use planning system and the Water Framework Directive (can't read barcode)
461The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
462Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
463Report 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
464A 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
465Responses 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
466Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
467A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
468Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
469Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
470Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
471East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
472Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
473Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
474Report 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
475A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.