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676Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
677The National Groundwater and Contaminated Land Centre (NGWCLC)
678The evaluation of a Philips ammonium ion selective electrode (220/14/T)
679The greening of Grasmere: its plankton periodicity in 1988
680A strategic review of the petroleum refinery Industry Sector
681Second annual review of the Sid/Otter catchment management plan 1999
682Contribution of small streams to potential fish production in the Conwy catchment
683NRA strategy for reducing the concentration of pesticides in controlled waters
684The ecology and management of riverine trees : interim report
685Low-cost modifications of the Crump weir to improve fish passage
686Policy and practice for the protection of groundwater - Thames region appendix
687Policy and practice for the protection of floodplains
688'Sea Vigil' water quality monitoring : the Wash 1992-1993
689Second annual review of the Seaton, Looe and Fowey catchment management plan
690The Yarrow catchment : recommendations for statutory water quality objectives
691The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
692The National Rivers Authority employee attitude survey : summary
693The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
694Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
695Pesticides in the aquatic environment 1997 : executive summary
696Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
697Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
698Fine sediment deposition in the River Keer : geomorphological assessment
699Snapshots of the environment : a new environmental approach
700Draft protocol for the derivation of Toxicity Based Consents