626 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
627 | The greening of Grasmere: its plankton periodicity in 1988 |
628 | A strategic review of the petroleum refinery Industry Sector |
629 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
630 | Second annual review of the Sid/Otter catchment management plan 1999 |
631 | Contribution of small streams to potential fish production in the Conwy catchment |
632 | The ecology and management of riverine trees : interim report |
633 | Low-cost modifications of the Crump weir to improve fish passage |
634 | Policy and practice for the protection of groundwater - Thames region appendix |
635 | Policy and practice for the protection of floodplains |
636 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
637 | The Yarrow catchment : recommendations for statutory water quality objectives |
638 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
639 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
640 | Guidance on the use of Bioassays in Ecological Risk Assessment |
641 | The National Rivers Authority employee attitude survey : summary |
642 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
643 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
644 | Pesticides in the aquatic environment 1997 : executive summary |
645 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
646 | Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A) |
647 | Snapshots of the environment : a new environmental approach |
648 | Draft protocol for the derivation of Toxicity Based Consents |
649 | The Loddon catchment, Thames : recommendations for statutory water quality objectives |
650 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |