151 | The Ecology and Conservation of the Southern Damselfly (Coenagrion mercuriale - Charpentier) in Britain |
152 | 1994 annual report on fisheries in the North West incorporating the annual summary of fishery statistics |
153 | Fish and the Ecological Assessment of Lakes and Rivers for the Water Framework Directive |
154 | Riverside litter : results of the 1990 campaign and a strategy for the future |
155 | Conservation and recreation: the Wye challenge: volume 1: report of the River Wye project |
156 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
157 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
158 | An investigation into the effects of Alton sewage works on the River Wey North |
159 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
160 | A brief history of the River Stour navigation : 1705 to the present day |
161 | The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish |
162 | Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority |
163 | A 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 |
164 | Implementation of the EC freshwater fish directive : water quality requirements for the support of fish life : report of the National Rivers Authority |
165 | 1995 drought report : a report on the severity of the drought of 1995 and its effect in the Severn and Trent catchments |
166 | The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates |
167 | The Movements of Salmon (Salmo salar L.) and Sea Trout (Salmo trutta L.) Smolts in the Lower River and Estuary of the River Conwy, North Wales |
168 | A study of the mayfly parasite Spiriopsis adipophila, Arvy and Peters (1972) (=Sprininella adipophila, Arvy and Delage 1966) in Ephemera danica from the River Pang, a tributary of the River Thames |
169 | Assessment of Ivybridge mobile monitoring station and investigation of the water quality of the River Erme and the effect of Ivybridge Sewage Treatment works final effluent |
170 | The behaviour of adult salmon (Salmo salar L.) in the River Tay as determined by radio telemetry |
171 | Time of travel for the Greadon Farm pollution incident on the Upper Torridge of 19th August 1997 (1997) |
172 | Evaluation of peroxygens for the amelioration of river pollution : on behalf of the Environment Agency, Thames Region |
173 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 1998-March 1999 |
174 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2001 |
175 | A report on the 1993 strategic stock assessment survey of the Eamont catchment with particular reference to salmonid fish |