676 | Contribution of small streams to potential fish production in the Conwy catchment |
677 | NRA strategy for reducing the concentration of pesticides in controlled waters |
678 | The ecology and management of riverine trees : interim report |
679 | Low-cost modifications of the Crump weir to improve fish passage |
680 | Policy and practice for the protection of groundwater - Thames region appendix |
681 | Policy and practice for the protection of floodplains |
682 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
683 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
684 | The Yarrow catchment : recommendations for statutory water quality objectives |
685 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
686 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
687 | Guidance on the use of Bioassays in Ecological Risk Assessment |
688 | The National Rivers Authority employee attitude survey : summary |
689 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
690 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
691 | Pesticides in the aquatic environment 1997 : executive summary |
692 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
693 | Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A) |
694 | The Louth coastal catchment management plan : final report |
695 | Fine sediment deposition in the River Keer : geomorphological assessment |
696 | Snapshots of the environment : a new environmental approach |
697 | Draft protocol for the derivation of Toxicity Based Consents |
698 | The Loddon catchment, Thames : recommendations for statutory water quality objectives |
699 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |
700 | The flood of February 1990 : technical services flood monitoring report |