551 | Time of travel on the [River] Chertsey Bourne under low flow conditions |
552 | Regional fishing guide : a guide to day ticket waters in the Midlands |
553 | An investigation into the sewage system and storm overflow at Beer (1997) |
554 | Flood warning information for the Hertfordshire/Essex border : River Stort catchment |
555 | Waste : strategic waste management survey : landfill within the East Midlands planning region |
556 | Sustainable urban drainage : an introduction : protecting the quality of our environment |
557 | Identification of water quality problems in the Strat and Neet catchments |
558 | Snapshots of the environment : managing our freshwater fisheries |
559 | The effects of fishing at low water levels |
560 | 1967 - George and Gideon cutting mbati for the bedroom block. |
561 | 1967 - Quakers arriving on the shore of L.George. |
562 | First annual review of the Taw/Torridge estuary catchment management plan (1996)
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563 | Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy |
564 | Method for the assessment of river water quality using benthic macroinvertebrates |
565 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
566 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
567 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
568 | The greening of Grasmere: its plankton periodicity in 1988 |
569 | A strategic review of the petroleum refinery Industry Sector |
570 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
571 | Second annual review of the Sid/Otter catchment management plan 1999 |
572 | Contribution of small streams to potential fish production in the Conwy catchment |
573 | NRA strategy for reducing the concentration of pesticides in controlled waters |
574 | Low-cost modifications of the Crump weir to improve fish passage |
575 | Second annual review of the Seaton, Looe and Fowey catchment management plan |