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 | Low-cost modifications of the Crump weir to improve fish passage |
681 | Policy and practice for the protection of groundwater - Thames region appendix |
682 | Policy and practice for the protection of floodplains |
683 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
684 | The Yarrow catchment : recommendations for statutory water quality objectives |
685 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
686 | The National Rivers Authority employee attitude survey : summary |
687 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
688 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
689 | Pesticides in the aquatic environment 1997 : executive summary |
690 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
691 | Fine sediment deposition in the River Keer : geomorphological assessment |
692 | Snapshots of the environment : a new environmental approach |
693 | Draft protocol for the derivation of Toxicity Based Consents |
694 | The Loddon catchment, Thames : recommendations for statutory water quality objectives |
695 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |
696 | Second Coniston OS map related to the Seismic Survey 1983 |
697 | Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983 |
698 | Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983 |
699 | Coniston OS map related to the Seismic Survey 1983 |
700 | The flood of February 1990 : technical services flood monitoring report |