"Report of work carried out by the British Trust for Ornithology under contract to Northumbrian Water Ltd.".
Includes 23 p. annex.
Impacts of changes in sewage disposal on waterbirds wintering on the Northumbrian coast : final report by N. H. K. Burton. ISBN 9781906204662. Published by British Trust for Ornithology in 2009. Publication and catalogue information, links to buy online and reader comments.