451 | Chironomids as indicators of biological quality : present use and future potential : a report of a workshop held at the Environment Agency, Thames Region |
452 | Local environment focus : local environmental issues in Shrewsbury, Shawbury, Newport, Telford, Shifnal, Much Wenlock, Bridgmorth, Bewdley, Bromsgrove, Droitwich and Worcester : Environment Agency newsletter for the Middle Severn, May 2003. |
453 | Further Development and Testing Of Artificial Intelligence Systems for the Classification and Diagnosis of River Quality Based on Biological and Environmental Data |
454 | Local environment focus : local environmental issues in and around Nottingham, Derby, Newark-on-Trent, Gainsborough, Scunthorpe and Ilkeston. : Local Environment Agency Plan (LEAP) for the Lower Trent and erewash : 2nd annual review July 2002 |