| 551 | The use of herbicides in or near water |
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| 552 | Status of rare fish : literature review of Freshwater Fish in the UK |
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| 553 | Suffolk estuarine strategies : Alde and Ore estuary strategy : introduction to the strategy |
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| 554 | Distribution of Azolla in the Great Ouse catchment |
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| 555 | Leachate Monitoring For The Brogborough Test Cell Project |
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| 556 | Time of travel on the [River] Chertsey Bourne under low flow conditions |
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| 557 | Regional fishing guide : a guide to day ticket waters in the Midlands |
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| 558 | Non-compliance of the Bidwell Brook with river quality objectives |
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| 559 | Flood warning information for the Hertfordshire/Essex border : River Stort catchment |
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| 560 | River Axe Fish Study - Evaluation of Fish Movements in the Estuary |
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| 561 | Waste : strategic waste management survey : landfill within the East Midlands planning region |
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| 562 | Identification of water quality problems in the Strat and Neet catchments |
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| 563 | Snapshots of the environment : managing our freshwater fisheries |
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| 564 | The effects of fishing at low water levels |
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| 565 | 1967 - George and Gideon cutting mbati for the bedroom block. |
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| 566 | 1967 - Quakers arriving on the shore of L.George. |
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| 567 | First annual review of the Taw/Torridge estuary catchment management plan (1996)
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| 568 | Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy |
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| 569 | Method for the assessment of river water quality using benthic macroinvertebrates |
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| 570 | The evaluation of a Philips ammonium ion selective electrode (220/14/T) |
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| 571 | The greening of Grasmere: its plankton periodicity in 1988 |
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| 572 | A strategic review of the petroleum refinery Industry Sector |
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| 573 | Guidelines for river corridor surveys in the NRA : February 1992. draft 3 |
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| 574 | Second annual review of the Sid/Otter catchment management plan 1999 |
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| 575 | Contribution of small streams to potential fish production in the Conwy catchment |
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