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526The effects of fishing at low water levels
5271967 - George and Gideon cutting mbati for the bedroom block.
5281967 - Quakers arriving on the shore of L.George.
529First annual review of the Taw/Torridge estuary catchment management plan (1996)
530Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy
531Method for the assessment of river water quality using benthic macroinvertebrates
532Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
533The National Groundwater and Contaminated Land Centre (NGWCLC)
534The evaluation of a Philips ammonium ion selective electrode (220/14/T)
535The greening of Grasmere: its plankton periodicity in 1988
536A strategic review of the petroleum refinery Industry Sector
537Guidelines for river corridor surveys in the NRA : February 1992. draft 3
538NRA strategy for reducing the concentration of pesticides in controlled waters
539Low-cost modifications of the Crump weir to improve fish passage
540Policy and practice for the protection of floodplains
541'Sea Vigil' water quality monitoring : the Wash 1992-1993
542Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
543The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
544Guidance on the use of Bioassays in Ecological Risk Assessment
545The National Rivers Authority employee attitude survey : summary
546Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
547Pesticides in the aquatic environment 1997 : executive summary
548Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
549The Louth coastal catchment management plan : final report
550Snapshots of the environment : a new environmental approach