Analysis of Wetland Bird Survey (WeBS) data for the Humber Estuary SSSI, SAC, SPA and Ramsar site : third appraisal : sector-level trends to winter 2016/17 /
Woodward, Ian D.,author.
Calbrade, N. A.(Neil A.),author.
Austin, G. E.(Graham Ernest),1957-author.
British Trust for Ornithology.
Natural England (Agency)
"Report of work carried out by the British Trust for Ornithology under contract to Natural England".
"November 2018".