| 401 | North Cornwall coastal streams : catchment action plan |
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| 402 | Northumbria region management action plan 1992/93 |
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| 403 | River Fowey : catchment action plan |
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| 404 | River Gannel : catchment action plan |
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| 405 | River Looe : catchment action plan |
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| 406 | River Seaton : catchment action plan |
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| 407 | Environmental appraisal of Derwentwater low water levels : Volume 2 : ecological appraisal |
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| 408 | Low flow augmentation study, River Wensum : Phase 1 Stage 1 draft planning report |
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| 409 | Un-ionised ammonia in north west estuaries using 1992/3 data |
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| 410 | Study into the effect of Chertsey STW on the North Arm of the River Bourne |
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| 411 | An investigation of sewage on the beach at Porthcothan |
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| 412 | Silloth sediment survey : April, July 1990 |
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| 413 | An investigation into bathing water quality at Millendreath |
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| 414 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
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| 415 | Catchment drainage studies and flood plain identification : Cockshaw/Halgut Burn at Hexham : section 105 - C30/92 surveys |
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| 416 | Bristol Avon Area fishery survey : Byde Mill Brook |
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| 417 | Second annual review of the Lower Bristol Avon catchment management plan |
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| 418 | Second annual review of the Upper Bristol Avon catchment management plan |
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| 419 | The River Avon and its tributaries near Malmesbury : river management studies |
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| 420 | Eel and elver studies in the Severn : interim report (256/6/ST) |
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| 421 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 422 | Air dispersion climate from the Castle Cement works at Ribblesdale |
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| 423 | Environmental screening for the Merseyside objective 1 programme : environmental screening guidelines |
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| 424 | River Mersey flood alleviation scheme : consultation document |
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| 425 | The River Alt/Crossens fish stock assessment 2001 |
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