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301Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918
302The influence of agriculture on the quality of natural waters in England and Wales
303The physical character of rivers and streams in the UK and Isle of Man
304The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998
305Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme
306The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment
307The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
308A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study
309A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989
310The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document
311An investigation into the effects of Alton sewage works on the River Wey North
312Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon
313A brief history of the River Stour navigation : 1705 to the present day
314The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish
315Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority
316Protecting your future : tackling flooding in the Thames Estuary through the 21st century
317The land-use planning system and the Water Framework Directive (can't read barcode)
318The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England;
319Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4
320Report 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
321Responses 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
322Report on the national marine analytical quality control scheme 1993/94 : presented to the 18th October 1994 meeting of the Marine Pollution Monitoring Management Group
323Identification of Blue Green Algae of the British Isles Guide to the Genera and Use of the Interactive CD-ROM for Identification of Species
324Outlook for the environment : a consultation paper by the Environment Agency on the priorities for investment by water companies in environmental improvements
325Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority