Coverage and effort

Author(s): Gillings, S., Balmer, D.E., Swann, R.L. & Caffrey, B.J.
Published: 2013
Editors: Balmer, D.E., Gillings, S., Caffrey, B.J., Swann, R.L., Downie, I.S. & Fuller, R.J.
Bird Atlas 2007-11: the breeding and wintering birds of Britain and Ireland
Pages: 90 - 113
ISBN: 978-1-908581-28-0
Publisher: BTO Books(Thetford)