651 | Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy |
652 | Method for the assessment of river water quality using benthic macroinvertebrates |
653 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
654 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
655 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
656 | The greening of Grasmere: its plankton periodicity in 1988 |
657 | A strategic review of the petroleum refinery Industry Sector |
658 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
659 | Contribution of small streams to potential fish production in the Conwy catchment |
660 | NRA strategy for reducing the concentration of pesticides in controlled waters |
661 | The ecology and management of riverine trees : interim report |
662 | Low-cost modifications of the Crump weir to improve fish passage |
663 | Policy and practice for the protection of groundwater - Thames region appendix |
664 | Policy and practice for the protection of floodplains |
665 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
666 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
667 | The Yarrow catchment : recommendations for statutory water quality objectives |
668 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
669 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
670 | Guidance on the use of Bioassays in Ecological Risk Assessment |
671 | The National Rivers Authority employee attitude survey : summary |
672 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
673 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
674 | Pesticides in the aquatic environment 1997 : executive summary |
675 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |