426 | First annual review of the Taw/Torridge estuary catchment management plan (1996)
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427 | Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy |
428 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
429 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
430 | A strategic review of the petroleum refinery Industry Sector |
431 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
432 | Second annual review of the Sid/Otter catchment management plan 1999 |
433 | Contribution of small streams to potential fish production in the Conwy catchment |
434 | NRA strategy for reducing the concentration of pesticides in controlled waters |
435 | The ecology and management of riverine trees : interim report |
436 | Low-cost modifications of the Crump weir to improve fish passage |
437 | Policy and practice for the protection of floodplains |
438 | Second annual review of the Seaton, Looe and Fowey catchment management plan |
439 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
440 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
441 | Guidance on the use of Bioassays in Ecological Risk Assessment |
442 | The National Rivers Authority employee attitude survey : summary |
443 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
444 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
445 | Pesticides in the aquatic environment 1997 : executive summary |
446 | Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A) |
447 | Draft protocol for the derivation of Toxicity Based Consents |
448 | Assessment of the Impact of Nutrient Removal on Eutrophic Rivers |
449 | Second Coniston OS map related to the Seismic Survey 1983 |
450 | Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983 |