626 | Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy |
627 | Method for the assessment of river water quality using benthic macroinvertebrates |
628 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
629 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
630 | The greening of Grasmere: its plankton periodicity in 1988 |
631 | A strategic review of the petroleum refinery Industry Sector |
632 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
633 | Second annual review of the Sid/Otter catchment management plan 1999 |
634 | Contribution of small streams to potential fish production in the Conwy catchment |
635 | NRA strategy for reducing the concentration of pesticides in controlled waters |
636 | The ecology and management of riverine trees : interim report |
637 | Low-cost modifications of the Crump weir to improve fish passage |
638 | Policy and practice for the protection of groundwater - Thames region appendix |
639 | Policy and practice for the protection of floodplains |
640 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
641 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
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 | The National Rivers Authority employee attitude survey : summary |
646 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
647 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
648 | Pesticides in the aquatic environment 1997 : executive summary |
649 | Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A) |
650 | The Louth coastal catchment management plan : final report |