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451The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
452A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
453A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
454A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990
455The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
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;
462Report 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
463A 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
464Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
465A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
466Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
467Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
468Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
469East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
470Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
471Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
472Report 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
473A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972.
474The effects of ammonia in discharges from Hogsmill STW on the water quality of the River Thames at Teddington : Summer 1990 an update
4751995 drought report : a report on the severity of the drought of 1995 and its effect in the Severn and Trent catchments