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551Sustainable urban drainage : an introduction : protecting the quality of our environment
552Identification of water quality problems in the Strat and Neet catchments
553The effects of fishing at low water levels
5541967 - George and Gideon cutting mbati for the bedroom block.
5551967 - Quakers arriving on the shore of L.George.
556First annual review of the Taw/Torridge estuary catchment management plan (1996)
557Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy
558Method for the assessment of river water quality using benthic macroinvertebrates
559Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
560The National Groundwater and Contaminated Land Centre (NGWCLC)
561The evaluation of a Philips ammonium ion selective electrode (220/14/T)
562The greening of Grasmere: its plankton periodicity in 1988
563A strategic review of the petroleum refinery Industry Sector
564Guidelines for river corridor surveys in the NRA : February 1992. draft 3
565Second annual review of the Sid/Otter catchment management plan 1999
566Contribution of small streams to potential fish production in the Conwy catchment
567NRA strategy for reducing the concentration of pesticides in controlled waters
568Low-cost modifications of the Crump weir to improve fish passage
569'Sea Vigil' water quality monitoring : the Wash 1992-1993
570Second annual review of the Seaton, Looe and Fowey catchment management plan
571The Yarrow catchment : recommendations for statutory water quality objectives
572The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
573The National Rivers Authority employee attitude survey : summary
574Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
575Pesticides in the aquatic environment 1997 : executive summary