426 | An investigation of sewage on the beach at Porthcothan |
427 | Charging for discharges scheme : guidance to the engineering industry |
428 | The Test catchment southern : recommendations for statutory water quality objectives |
429 | The Worcestershire Stour catchment : recommendations for statutory water quality objectives |
430 | An assessment of river water quality in the River Kenn |
431 | A survey of ferruginous minewater impacts in the Welsh coalfields |
432 | A survey of ferruginous minewater impacts in the Welsh coalfields |
433 | Dioxins and the River Doe Lea : plain English report |
434 | Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report |
435 | Locks and weirs on the river Thames : how do they work? |
436 | The quality of rivers and estuaries in Northumbria region 1990 |
437 | A guide to sustainable urban drainage : protecting the quality of our environment |
438 | Estuarial migration of Atlantic salmon in the river Dee (North Wales) |
439 | Doe Lea restoration study : the work of WRc |
440 | The NRA in business : annual review and summary accounts 1993-94 |
441 | Cyanobacteria (blue-green algae) in the south west region 1989 |
442 | Toxic blue-green algae : a report by the National Rivers Authority |
443 | Investigation of salinity in the river Thurne catchment of North East Norfolk |
444 | Catchment abstraction management strategies (CAMS) and the Water Framework Directive (WFD) |
445 | Managing water abstraction : the catchment abstraction management strategy process : April 2001 |
446 | Water quality investigations in the Newlyn river catchment |
447 | An assessment of water quality in the River Yarty catchment |
448 | Investigations of discharges into the River Lemon at Newton Abbot |
449 | Report on monitoring of environmental quality in the Severn Estuary |
450 | Artificial recharge to groundwater in the Otter valley |