| 501 | The interpretation of rod and net catch data |
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| 502 | Problems with sea trout and salmon in the Western Highlands |
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| 503 | Clear Options towards an operational model for the Lee Valley Reservoirs |
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| 504 | The Cam catchment : recommendations for statutory water quality objectives |
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| 505 | The River Cam catchment management plan : annual monitoring report |
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| 506 | Algal blooms in the Lower Tees- Perspectives and prospects
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| 507 | Pearl Mussel Image: First out of the blocks |
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| 508 | Statement on public consultation for the Dove CMP : July 1995 |
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| 509 | The Warwickshire Avon catchment management plan : final plan : October 1994 |
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| 510 | FWR - User guide for assessing the impact of combined sewer overflows |
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| 511 | The National Centre for Environmental Data and Surveillance : general leaflet |
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| 512 | The Use of Immuno Based Techniques for Chemical Analysis |
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| 513 | Snapshots of the environment : integrated river basin management |
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| 514 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
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| 515 | River quality in England and Wales : a report of the 1990 survey |
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| 516 | Snapshots of the environment : understanding coastal water quality |
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| 517 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
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| 518 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
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| 519 | Rivers of the Isle of Wight fact file |
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| 520 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
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| 521 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
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| 522 | 'Sea Vigil' water quality monitoring : the East coast 1992-1993 |
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| 523 | Catches of migratory fish in the River Don, Aberdeenshire |
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| 524 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
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| 525 | The 1990 river and estuary classification survey of England and Wales |
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