676 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
677 | Second annual review of the Sid/Otter catchment management plan 1999 |
678 | Contribution of small streams to potential fish production in the Conwy catchment |
679 | NRA strategy for reducing the concentration of pesticides in controlled waters |
680 | The ecology and management of riverine trees : interim report |
681 | Low-cost modifications of the Crump weir to improve fish passage |
682 | Policy and practice for the protection of groundwater - Thames region appendix |
683 | Policy and practice for the protection of floodplains |
684 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
685 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
686 | The Yarrow catchment : recommendations for statutory water quality objectives |
687 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
688 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
689 | Guidance on the use of Bioassays in Ecological Risk Assessment |
690 | The National Rivers Authority employee attitude survey : summary |
691 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
692 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
693 | Pesticides in the aquatic environment 1997 : executive summary |
694 | Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A) |
695 | The Louth coastal catchment management plan : final report |
696 | Fine sediment deposition in the River Keer : geomorphological assessment |
697 | Snapshots of the environment : a new environmental approach |
698 | Draft protocol for the derivation of Toxicity Based Consents |
699 | The Loddon catchment, Thames : recommendations for statutory water quality objectives |
700 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |