651 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
652 | The greening of Grasmere: its plankton periodicity in 1988 |
653 | A strategic review of the petroleum refinery Industry Sector |
654 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
655 | Second annual review of the Sid/Otter catchment management plan 1999 |
656 | Contribution of small streams to potential fish production in the Conwy catchment |
657 | The ecology and management of riverine trees : interim report |
658 | Low-cost modifications of the Crump weir to improve fish passage |
659 | Policy and practice for the protection of groundwater - Thames region appendix |
660 | Policy and practice for the protection of floodplains |
661 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
662 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
663 | The Yarrow catchment : recommendations for statutory water quality objectives |
664 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
665 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
666 | Guidance on the use of Bioassays in Ecological Risk Assessment |
667 | The National Rivers Authority employee attitude survey : summary |
668 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
669 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
670 | Pesticides in the aquatic environment 1997 : executive summary |
671 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
672 | Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A) |
673 | The Louth coastal catchment management plan : final report |
674 | Snapshots of the environment : a new environmental approach |
675 | Draft protocol for the derivation of Toxicity Based Consents |