526 | Front Cover of Some Methods for the Statistical Analysis of Samples of Benthic Invertebrates |
527 | Assessment of the nutrient status and associated algal productivity of Malham Tarn, Yorkshire
|
528 | Invertebrates of Esthwaite in relation to development of fish farming in the South Basin |
529 | Review of Literature on the Effect on Aquatic Communities of Particulate Copper in River Systems
|
530 | Pesticides 1998 : a summary of monitoring of the aquatic environment in England and Wales |
531 | Planning application for the proposed Maidenhead, Windsor and Eton flood alleviation scheme January 1991 |
532 | Database and atlas of aquatic vascular plants in the British Isles : part 1 species accounts |
533 | The evaluation of a Partech model 5100 hand-held dissolved oxygen meter (220/26/T) |
534 | Catches of Brown Trout in the River Don - Preliminary analysis of Angler's Returns |
535 | Front Cover of A Key to the British Freshwater Cyclopid and Calanoid Copepods, with Ecological Notes |
536 | Investigation into the storm overflow discharge regime of Hill Barton Seawage Treatment Works Okehampton |
537 | Survey of physical characteristics of salmon spawning riffles in the river North Tyne
|
538 | Nitrates in surface water, inputs and seasonality- Progress report for the period April- December 1987 |
539 | Thames 21 - a planning perspective and a sustainable strategy for the Thames Region : consultation draft |
540 | Environmental protection - the waste management licensing regulations 1994 : amended and consolidated. Version 5 |
541 | Problems and solutions in the management of open seas fisheries for Atlantic salmon |
542 | Space to live, space to play : a recreation strategy for the River Thames : appendices |
543 | Blooming weather: Predicting the incidence of summers with high-risk of cyanobacterial blooms |
544 | Mercury and methylmercury in the river Yare, Norfolk (1986 - 1992) : executive summary (OI/420/9/A) |
545 | Best Available Techniques For The Control Of Pollution In Petrochemical And Large Volume Organic Chemical Processes |
546 | An approach to hydrogeological assessment of Quaternary deposits in the UK: Part 1 Background |
547 | Developing Guidance for Setting Limits on Radioactive Discharges to the Environment from Nuclear-licensed Sites |
548 | Procedures and results of biochemical oxygen demand tests carried out at the Crossness laboratory 1990 |
549 | Research and development 2000 : a strategy for the research and development support service : version 2 |
550 | The Use of Catch Statistics to Monitor Fishery Change - Coarse Fish Study - Synopsis |