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176A survey of trace metals in biota of the Mersey estuary 1993
177Continuous water quality monitoring results for the Carnon river
178An assessment of the NRA algal growth inhibition test : 1993/4
179A second stage evaluation of the Grant YSI3815 Water Logger
180An investigation of sewage on the beach at Porthcothan
181The Test catchment southern : recommendations for statutory water quality objectives
182The Worcestershire Stour catchment : recommendations for statutory water quality objectives
183An assessment of river water quality in the River Kenn
184The quality of rivers and estuaries in Northumbria region 1990
185Estuarial migration of Atlantic salmon in the river Dee (North Wales)
186The NRA in business : annual review and summary accounts 1993-94
187Cyanobacteria (blue-green algae) in the south west region 1989
188Toxic blue-green algae : a report by the National Rivers Authority
189Investigation of salinity in the river Thurne catchment of North East Norfolk
190Water quality investigations in the Newlyn river catchment
191Report on monitoring of environmental quality in the Severn Estuary
192Artificial recharge to groundwater in the Otter valley
193Water quality in Anglian Region : the first five years
194Investigation to determine the cause of the long-term BOD failure at Higher Weaver routine monitoring site (70532960) for 1995 and 1997
195Changes in the phosphorus content of the sediment of Esthwaite Water and water quality in response to a decreasing input of sewage-borne phosphorus
196Water Quality and Freshwater Flow in the Thames Tideway in Relation to Salmon Migration, with particular reference to the effects of low flow in 1990
197Wimbleball pumped storage scheme : review of environmental statement (appendix B3) : implications for water quality in Wimbleball Reservoir, the River Exe (non QUASAR) parameters) and the Exe estuary
198The quality of rivers and canals in England and Wales (1990 to 1992) : as assessed by a new general quality assessment scheme : report of the National Rivers Authority
199Tamar Lakes project 2001 : initial assessment of nutrient data to identify pollution sources, assess the effect of Tamar Lakes on the downstream water quality and to recommend future monitoring requirements
200Investigation of the effects of sewage treatment works discharges on receiving waters in the Lowermoor Water Treatment Works supply area November 1989