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