51 | The quality of the Humber Estuary 1980-1990 : report of the National Rivers Authority |
52 | Domesday to the dawn of the new millennium : 900 years of the Don Fishery |
53 | The Thames navigation : charting the future : a consultation document issued by the NRA Thames Region |
54 | Back to life : bringing the environment back to the people of the North West |
55 | Study into the effect of Chertsey STW on the North Arm of the River Bourne |
56 | The Natural (Baseline) Quality Of Groundwaters In England And Wales. The Chalk Of The South Downs |
57 | Committed to the environment : a report from the committees of the Environment Agency's Southern Region for the year 1999/00 |
58 | Annex to 'achieving the quality' |
59 | Welcome to the Essex catchment |
60 | The water bill : trickle irrigation |
61 | Algae demonstrations in the lab |
62 | Paleolimnological Approaches to the WFD |
63 | Guide to the Medway navigation |
64 | The Agency's conservation duties (SD2) |
65 | Water in the Thetford area
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66 | The River Ash : enhancement project |
67 | The Development of LandSim 2.5 |
68 | The River Darent conservation project |
69 | Meanders in the Amazon River |
70 | Air quality and the environment |
71 | The registration of waste carriers |
72 | The Dee regulation scheme (bilingual) |
73 | The tidal Thames : fact file |
74 | Conservation in the Anglian region |
75 | River in the Dourdogne region |