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626The National Groundwater and Contaminated Land Centre (NGWCLC)
627The evaluation of a Philips ammonium ion selective electrode (220/14/T)
628The greening of Grasmere: its plankton periodicity in 1988
629A strategic review of the petroleum refinery Industry Sector
630Guidelines for river corridor surveys in the NRA : February 1992. draft 3
631Second annual review of the Sid/Otter catchment management plan 1999
632Contribution of small streams to potential fish production in the Conwy catchment
633The ecology and management of riverine trees : interim report
634Low-cost modifications of the Crump weir to improve fish passage
635Policy and practice for the protection of groundwater - Thames region appendix
636Policy and practice for the protection of floodplains
637'Sea Vigil' water quality monitoring : the Wash 1992-1993
638Second annual review of the Seaton, Looe and Fowey catchment management plan
639The Yarrow catchment : recommendations for statutory water quality objectives
640Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
641The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
642Guidance on the use of Bioassays in Ecological Risk Assessment
643The National Rivers Authority employee attitude survey : summary
644Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
645Pesticides in the aquatic environment 1997 : executive summary
646Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
647Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
648The Louth coastal catchment management plan : final report
649Snapshots of the environment : a new environmental approach
650Draft protocol for the derivation of Toxicity Based Consents