Waterways breeding bird survey : progress 1998-2009 and long-term population trends /
Marchant, John H.,author.
Hulme, Mark F.,author.
Noble, David G.,author.
British Trust for Ornithology,issuing body.
Great Britain.Environment Agency.
"Report to the Environment Agency in respect of R&D project W1-071."
Includes bibliographical references.
Water birds
Bird populations
Bird surveys