| 6501 | Corporate plan 1991/1992 : Southern region |
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| 6502 | East Anglian salt marshes |
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| 6503 | Environmental opportunities in low lying coastal areas under a scenario of climate change : final report (255/2/T) |
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| 6504 | Fisheries survey 1990 : River Coln, River Churn, Ampney Brook : key site monitoring in relation to low flow problems |
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| 6505 | Humber estuary catchment management plan : action plan : May 1995 |
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| 6506 | River Tavy EC Freshwater Fish Directive failure 1993 |
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| 6507 | Nene Valley water level management strategy : information status report |
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| 6508 | Nene waterways partnership initiative : strategy consultation document |
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| 6509 | North West Norfolk catchment management plan : action plan : November 1995 |
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| 6510 | Ouse Washes : barrier banks improvements |
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| 6511 | Physical environment for river invertebrate communities : progress report |
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| 6512 | Planning for the rising tides - the Humber Estuary - consultation on managed realignment: information for the landowners and tenants - June 2002 |
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| 6513 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 6514 | Poole Harbour and Purbeck catchment management plan : first annual review |
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| 6515 | Redgrave and Lopham Fens alleviation scheme : project appraisal report : version 1.0 |
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| 6516 | Report on alternative methods of river bank protection : Norfolk District |
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| 6517 | River Test catchment management plan : phase 1 |
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| 6518 | River Test catchment management plan : phase 1. Draft. |
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| 6519 | River quality survey GQA assessment 1998 : Dales area freshwater rivers and canals river reach classification summary 1990-9 |
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| 6520 | Summary report on blue-green algae toxin analysis, Toxicity Assessment and reporting to the Environment Agency, 1998 |
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| 6521 | Upper Ouse catchment management plan : consultation report summary : March 1996 |
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| 6522 | Notonecta viridis, |
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| 6523 | Rivers Swale, Ure and Ouse catchment management plan : final plan |
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| 6524 | Trent licensing policy review : executive summary report |
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| 6525 | Factual report on the boreholes and installation of standpipes for the combined investigations in connection with the East Ruston common SSSI Alleviation Scheme |
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