| 51 | The Nidd and Wharfe catchment (river factfiles) |
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| 52 | Impact of the signal crayfish Pacifastacus leniusculus and its associated crayfishery on the River Thame |
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| 53 | Water resources for the future : a summary of the strategy for Thames Region |
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| 54 | Bacterial quality of the bathing waters at Seaton, Cornwall, and of the River Seaton |
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| 55 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
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| 56 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 57 | Water resources for the future : a summary of the strategy for North East Region |
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| 58 | Preliminary assessment of the ability of Restormel fish counter to enumerate the passage of migratory salmonids on the River Fowey : Cornwall Area Fisheries Science Team |
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| 59 | A study of the mayfly parasite Spiriopsis adipophila, Arvy and Peters (1972) (=Sprininella adipophila, Arvy and Delage 1966) in Ephemera danica from the River Pang, a tributary of the River Thames |
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| 60 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 1998-March 1999 |
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| 61 | Evaluation of FRONTIERS accumulation forecasts in the NRA Thames and North West regions : final report of the Joint Met |
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| 62 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000 |
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| 63 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2001 |
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| 64 | Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996 |
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| 65 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
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| 66 | A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994 |
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| 67 | A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids |
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| 68 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 2000 - March 2001 |
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| 69 | An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989 |
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| 70 | A report on the River Chew at Chewton Mendip, 6th August 1992 |
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| 71 | The Adur and Ouse catchment abstraction management strategy : consultation document |
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| 72 | Environmental assessment of selected abandoned minewaters in the North East region |
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| 73 | Eel and elver studies in the Severn : interim report (256/6/ST) |
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| 74 | Water quality investigations in the Newlyn river catchment |
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| 75 | Instream Flow Requirements of the River Wissey, Norfolk, Annex C - April 1993
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