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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
406A brief history of the River Stour navigation : 1705 to the present day
407The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
408Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
409The land-use planning system and the Water Framework Directive (can't read barcode)
410A 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
411Responses 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
412Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
413Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
414Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
415Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
416Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
417Report 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
418A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
419The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update
4201995 drought report : a report on the severity of the drought of 1995 and its effect in the Severn and Trent catchments
421Pesticides in the aquatic environment : report of the National Rivers Authority, prepared by the National Centre for Toxic and Persistant Substances (TAPS)
422The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates
423The Movements of Atlantic Salmon (Salmo salar L.) and Sea Trout (Salmo trutta L.) Smolts in the Impounded Estuary of the R.Tawe, South Wales
424The new waterlands? Proceedings of a one day seminar organised by the Sussex Wildlife Trust as part of the RSNC Wildlife Trusts Parnership Water For Wildlife campaign
425The effects of ammonia in discharges from Hogsmill Valley sewage treatment works on the water quality of the River Thames at Teddington