| 476 | Esthwaite Water Seismic Survey data 1983-Section 01 |
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| 477 | Typha angustifolia flowers |
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| 478 | The influence of variations in reedswamp structure and extent upon macroinvertebrates |
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| 479 | A map illustrating the locations of litter collection and litter bag installation |
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| 480 | Paraleptophlebia tumida |
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| 481 | Progress Report December 1989 |
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| 482 | Atlantic Salmon Trust Journal 2010 |
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| 483 | Progress Report December 1986 |
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| 484 | Progress Report June 1990 |
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| 485 | Atlantic Salmon Trust Summer Journal 2008 |
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| 486 | Genetics and the management of the Atlantic salmon |
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| 487 | Progress Report June 1998 |
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| 488 | Impact of nutrients in estuaries - Proceedings of a workshop on 23 May 1995 (639/1/A) |
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| 489 | Assessment of radioactive discharge screening levels for biota protected under the habitats regulations : April 2002 |
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| 490 | Sensitive Areas (eutrophic) and "Polluted Waters" (eutrophic). Guidance note on information Gathering for Future Designation Reviews
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| 491 | A strategy for implementing the Environment Agency's contribution to the UK Biodiversity Action Plan |
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| 492 | Water resources development strategies : London, 20th April 1994 |
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| 493 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : AQC audit |
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| 494 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : primary audit |
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| 495 | Windermere South Basin Seismic Survey Data 1983 Section 11 |
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| 496 | Results of the oyster (Crassostrea gigas) embryo-larval biassay on samples taken during the winter phase of national maritime monitoring programme 1997 : interim report |
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| 497 | Fish pass design and evaluation. Phase 1 (R and D Report 5) |
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| 498 | Entomology For Angler's Course (2009) 01 |
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| 499 | Entomology For Angler's Course (2009) 03 |
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| 500 | Entomology For Angler's Course (2009) 02 |
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