| 551 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
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| 552 | Introductory guidance on the Agency's contribution to sustainable development (SD1) |
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| 553 | The National Centre for Toxic and Persistent Substances |
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| 554 | Algal blooms in the Lower Tees- Perspectives and prospects
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| 555 | Acidification of freshwaters: the threat and its mitigation |
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| 556 | Pearl Mussel Image: First out of the blocks |
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| 557 | FWR - User guide for assessing the impact of combined sewer overflows |
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| 558 | The National Centre for Environmental Data and Surveillance : general leaflet |
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| 559 | Project management and the scheme of delegation : a summary guide : April 1995 |
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| 560 | The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual) |
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| 561 | The Use of Immuno Based Techniques for Chemical Analysis |
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| 562 | Snapshots of the environment : integrated river basin management |
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| 563 | Water from the River Dee : a working partnership |
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| 564 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
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| 565 | Snapshots of the environment : understanding coastal water quality |
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| 566 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
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| 567 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
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| 568 | Rivers of the Isle of Wight fact file |
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| 569 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
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| 570 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
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| 571 | The Mersey estuary : a report on environmental quality |
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| 572 | 'Sea Vigil' water quality monitoring : the East coast 1992-1993 |
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| 573 | Catches of migratory fish in the River Don, Aberdeenshire |
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| 574 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 575 | The 1990 river and estuary classification survey of England and Wales |
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