| 51 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 52 | Estuarial migration of Atlantic salmon in the river Dee (North Wales) |
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| 53 | Policy and practice for the protection of groundwater - NRA leaflet |
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| 54 | Conservation and recreation : the Wye challenge : volume 2 : technical appendices |
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| 55 | Charging for discharges scheme : guidance to the agricultural industry |
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| 56 | Snapshots of the environment : integrated river basin management |
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| 57 | Water from the River Dee : a working partnership |
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| 58 | River quality in England and Wales : a report of the 1990 survey |
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| 59 | Policy and practice for the protection of groundwater : draft for consultation |
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| 60 | Snapshots of the environment : understanding coastal water quality |
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| 61 | Results of the NRA Welsh regional marine bioaccumulation programme 1991-1993 : SE/EAU/94/8 |
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| 62 | The 1990 river and estuary classification survey of England and Wales |
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| 63 | Policy and practice for the protection of groundwater : regional appendix Welsh region |
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| 64 | The Menai Strait Catchment Managment Plan Action Plan; 1995 (Bilingual) |
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| 65 | Policy and practice for the protection of groundwater |
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| 66 | Water resources development strategy : the Resplan Model. Supplementary report no. 7 |
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| 67 | Policy and practice for the protection of groundwater |
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| 68 | The quality of rivers in England and Wales (1990 to 1995) |
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| 69 | A guide to sustainable urban drainage : protecting the quality of our environment |
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| 70 | Proposals for statutory water quality objectives : report of the National Rivers Authority |
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| 71 | The Tawe and South Gower catchment management plan : action plan 1995 (bilingual) |
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| 72 | Sustainable urban drainage : an introduction : protecting the quality of our environment |
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| 73 | Snapshots of the environment : managing our freshwater fisheries |
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| 74 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
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| 75 | Contribution of small streams to potential fish production in the Conwy catchment |
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