Waterbirds in the UK 2008/09: The Wetland Bird Survey
Author(s): Calbrade, N.A., Holt, C.A., Austin, G.E., Mellan, H.J., Hearn, R.D., Stroud, D.A., Wotton, S.R. & Musgrove, A.J.
Published: January 2010
Publisher: BTO/RSPB/JNCC, Thetford.
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