551 | 1967 - George and Gideon cutting mbati for the bedroom block. |
552 | 1967 - Quakers arriving on the shore of L.George. |
553 | First annual review of the Taw/Torridge estuary catchment management plan (1996)
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554 | Method for the assessment of river water quality using benthic macroinvertebrates |
555 | Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide |
556 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
557 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
558 | The greening of Grasmere: its plankton periodicity in 1988 |
559 | A strategic review of the petroleum refinery Industry Sector |
560 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
561 | Contribution of small streams to potential fish production in the Conwy catchment |
562 | NRA strategy for reducing the concentration of pesticides in controlled waters |
563 | Low-cost modifications of the Crump weir to improve fish passage |
564 | Policy and practice for the protection of groundwater - Thames region appendix |
565 | Policy and practice for the protection of floodplains |
566 | Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere |
567 | The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T) |
568 | Guidance on the use of Bioassays in Ecological Risk Assessment |
569 | The National Rivers Authority employee attitude survey : summary |
570 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
571 | Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A) |
572 | Pesticides in the aquatic environment 1997 : executive summary |
573 | Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment |
574 | The Louth coastal catchment management plan : final report |
575 | Fine sediment deposition in the River Keer : geomorphological assessment |