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326The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration
327Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918
328The physical character of rivers and streams in the UK and Isle of Man
329The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
330The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
331A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
332A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
333The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
334An investigation into the effects of Alton sewage works on the River Wey North
335A brief history of the River Stour navigation : 1705 to the present day
336The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
337Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
338The land-use planning system and the Water Framework Directive (can't read barcode)
339The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
340Report 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
341Responses 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
342Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
343A report on the 1992 strategic stock assessment survey of the upper Dewent catchment and the River Marron with particular reference to salmonids
344Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
345Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
346Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority
347East Devon public water supply strategy as assessment of the hydrological impact of the Wimbleball pump storage scheme at key sites on the River Exe
348Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers
349Response to questions posed by Northumbrian Water Authority, with special reference to the fisheries implications of the operation of the Kielder Water Scheme
350Report 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