626 | 1967 - Quakers arriving on the shore of L.George. |
627 | First annual review of the Taw/Torridge estuary catchment management plan (1996)
|
628 | Method for the assessment of river water quality using benthic macroinvertebrates |
629 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
630 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
631 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
632 | The greening of Grasmere: its plankton periodicity in 1988 |
633 | A strategic review of the petroleum refinery Industry Sector |
634 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
635 | Contribution of small streams to potential fish production in the Conwy catchment |
636 | NRA strategy for reducing the concentration of pesticides in controlled waters |
637 | The ecology and management of riverine trees : interim report |
638 | Low-cost modifications of the Crump weir to improve fish passage |
639 | Policy and practice for the protection of groundwater - Thames region appendix |
640 | Policy and practice for the protection of floodplains |
641 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
642 | The Yarrow catchment : recommendations for statutory water quality objectives |
643 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
644 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
645 | Guidance on the use of Bioassays in Ecological Risk Assessment |
646 | The National Rivers Authority employee attitude survey : summary |
647 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
648 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
649 | Pesticides in the aquatic environment 1997 : executive summary |
650 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |