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651The effects of fishing at low water levels
6521967 - George and Gideon cutting mbati for the bedroom block.
6531967 - Quakers arriving on the shore of L.George.
654First annual review of the Taw/Torridge estuary catchment management plan (1996)
655Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy
656Method for the assessment of river water quality using benthic macroinvertebrates
657Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
658The National Groundwater and Contaminated Land Centre (NGWCLC)
659The evaluation of a Philips ammonium ion selective electrode (220/14/T)
660The greening of Grasmere: its plankton periodicity in 1988
661A strategic review of the petroleum refinery Industry Sector
662Guidelines for river corridor surveys in the NRA : February 1992. draft 3
663Contribution of small streams to potential fish production in the Conwy catchment
664NRA strategy for reducing the concentration of pesticides in controlled waters
665The ecology and management of riverine trees : interim report
666Low-cost modifications of the Crump weir to improve fish passage
667Policy and practice for the protection of groundwater - Thames region appendix
668Policy and practice for the protection of floodplains
669'Sea Vigil' water quality monitoring : the Wash 1992-1993
670The Yarrow catchment : recommendations for statutory water quality objectives
671Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
672The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
673Guidance on the use of Bioassays in Ecological Risk Assessment
674The National Rivers Authority employee attitude survey : summary
675The Use of a Hydroacoustic Counter for Assessing Salmon Stocks