| 51 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 52 | Charging for discharges scheme : guidance to the agricultural industry |
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| 53 | Snapshots of the environment : integrated river basin management |
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| 54 | Water from the River Dee : a working partnership |
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| 55 | River quality in England and Wales : a report of the 1990 survey |
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| 56 | Snapshots of the environment : understanding coastal water quality |
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| 57 | The 1990 river and estuary classification survey of England and Wales |
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| 58 | Policy and practice for the protection of groundwater : regional appendix Welsh region |
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| 59 | Sustainable urban drainage : an introduction : protecting the quality of our environment |
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| 60 | Snapshots of the environment : managing our freshwater fisheries |
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| 61 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
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| 62 | Contribution of small streams to potential fish production in the Conwy catchment |
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| 63 | Snapshots of the environment : a new environmental approach |
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| 64 | The utilisation of stick-pile otter holts in south east Wales |
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| 65 | The River Tywi catchment management plan : action plan (bilingual) |
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| 66 | A strategy for the management of salmon in England and Wales |
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| 67 | Water quality 2000 : a strategy for the water quality function |
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| 68 | Wetlands for Wales : a strategy for the third millenium |
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| 69 | The Occurrence of Sheep Dip Pesticides in Environmental Waters June 1997 |
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| 70 | Policy and practice for the protection of groundwater |
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| 71 | The quality of rivers in England and Wales (1990 to 1995) |
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| 72 | Doses from the consumption of Cardiff Bay flounder containing organically-bound tritium |
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| 73 | Water resources development strategy : the Resplan Model. Supplementary report no. 7 |
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| 74 | Policy and practice for the protection of groundwater |
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| 75 | Policy and practice for the protection of groundwater - NRA leaflet |
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