476 | The Use of Immuno Based Techniques for Chemical Analysis |
477 | Water from the River Dee : a working partnership |
478 | River quality in England and Wales : a report of the 1990 survey |
479 | Snapshots of the environment : understanding coastal water quality |
480 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
481 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
482 | Rivers of the Isle of Wight fact file |
483 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
484 | 'Sea Vigil' water quality monitoring : the East coast 1992-1993 |
485 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
486 | The 1990 river and estuary classification survey of England and Wales |
487 | The evaluation of an orion ammonium ion selective electrode (220/15/T) |
488 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
489 | General guide to the prevention of water pollution |
490 | Guidance on the use of Soil Screening Values for Ecological Risk Assessment |
491 | Highway runoff: Effects of soluble pollutants on the ecology of receiving waters |
492 | Life cycle assessment of disposable and reusable nappies in the UK |
493 | Managing the social aspects of flooding: Synthesis Report |
494 | National guidelines for the production of NRA regions 1990/91 regional plans |
495 | Operational mechanisms for the protection and enhancement of headwaters |
496 | Policy and practice for the protection of groundwater : regional appendix Welsh region |
497 | Procurement legislation and the NRA : a brief guide |
498 | Survey of copper speciation in the Great Ouse estuary |
499 | Sustainable development indicators : monitoring change in the East Midlands |
500 | Technical Support Materials for the Regulation of Radioactively Contaminated Land |