| 51 | The quality of rivers in England and Wales (1990 to 1995) |
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| 52 | The River Ogmore catchment management plan : action plan |
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| 53 | Further Validation of PHABSIM for the Habitat Requirements of Salmonid Fish |
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| 54 | A guide to sustainable urban drainage : protecting the quality of our environment |
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| 55 | Policy and practice for the protection of groundwater : regional appendix Welsh region |
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| 56 | Policy and practice for the protection of groundwater |
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| 57 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
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| 58 | Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report |
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| 59 | Snapshots of the environment : a new environmental approach |
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| 60 | Proposals for statutory water quality objectives : report of the National Rivers Authority |
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| 61 | Water resources development strategy : the Resplan Model. Supplementary report no. 7 |
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| 62 | Report on monitoring of environmental quality in the Severn Estuary |
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| 63 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 64 | River quality in England and Wales : a report of the 1990 survey |
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| 65 | Water quality 2000 : a strategy for the water quality function |
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| 66 | The River Dee catchment management plan : consultation report : June 1994 |
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| 67 | Estuarial migration of Atlantic salmon in the river Dee (North Wales) |
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| 68 | Conservation and recreation : the Wye challenge : volume 2 : technical appendices |
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| 69 | Policy and practice for the protection of groundwater : draft for consultation |
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| 70 | Charging for discharges scheme : guidance to the agricultural industry |
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| 71 | Contribution of small streams to potential fish production in the Conwy catchment |
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| 72 | Wetlands for Wales : a strategy for the third millenium |
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| 73 | The utilisation of stick-pile otter holts in south east Wales |
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| 74 | Snapshots of the environment : integrated river basin management |
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| 75 | Sustainable urban drainage : an introduction : protecting the quality of our environment |
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