| 6501 | Proposals for statutory water quality objectives : report of the National Rivers Authority |
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| 6502 | Quality of Bathing Waters in Hampshire, Sussex, Kent and the Isle of Wight : 1993 Bathing Season : NRA Report DL/bw4/94 |
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| 6503 | River Ancholme catchment management plan : consultation report : January 1996 |
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| 6504 | Regional water quality monitoring and surveillance programme for 1993 : tidal waters monitoring and surveillance : final draft report |
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| 6505 | Summary report on environmental developments : volume 2 : legislation and European practice : November 1998 - May 1989 |
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| 6506 | Summary report on environmental developments : volume 3 : legislation and European practice : June 1989 to March 1990 |
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| 6507 | The influence of agriculture on the quality of natural waters in England and Wales |
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| 6508 | National Rivers Authority/Po River Basin Authority collaboration programme : improved monitoring systems for river water quality : secretariat meeting, Parma, 13-15 December 1995 : programme and briefing notes |
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| 6509 | The law of the National Rivers Authority |
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| 6510 | Bedford Ouse (lower reaches) catchment management plan : consultation report : April 1994 |
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| 6511 | Bedford Ouse (lower reaches) catchment management plan : summary report : April 1994 |
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| 6512 | Blackwater catchment management plan : consultation report : November 1994 |
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| 6513 | Managing the drought and water resources : key issues statements approved by the board of the NRA June 1992 |
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| 6514 | Blackwater River Catchment Management Plan : Consultation Draft |
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| 6515 | Blackwater River catchment management plan : consultation draft full report : November 1992 |
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| 6516 | Simba rapids |
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| 6517 | Blackwater River catchment management plan : final plan : November 1994 |
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| 6518 | Blackwater River catchment management plan consultation draft : summary report : November 1992 |
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| 6519 | Blythe/Cole/Bourne Catchment Management Plan Consultation Report (and Summary Report) |
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| 6520 | A new angle : a simpler way of licensing fishing |
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| 6521 | Broads research progress report 1991 |
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| 6522 | Broads restoration project : first year report 1990 |
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| 6523 | Teddington low flow survey 1991 |
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| 6524 | Conservation and recreation report 1995/96 |
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| 6525 | Conservation access recreation annual report 95-96 |
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