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401A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
402A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
403A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990
404The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
405An investigation into the effects of Alton sewage works on the River Wey North
406Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
407A brief history of the River Stour navigation : 1705 to the present day
408The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
409Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
410Protecting your future : tackling flooding in the Thames Estuary through the 21st century
411The land-use planning system and the Water Framework Directive (can't read barcode)
412The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
413Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
414Report 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
415A 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
416Responses 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
417Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
418A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
419Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
420Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
421Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
422Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
423Report 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
424A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
425The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update