Counting birds on farmland habitats in winter: Capsule Perimeter counts underestimate the number of birds using agricultural fields.
Atkinson, Philip W., Fuller, Richard A., Gillings, Simon, Vickery, Juliet A.Volume:
53
Language:
english
Journal:
Bird Study
DOI:
10.1080/00063650609461446
Date:
November, 2006
File:
PDF, 122 KB
english, 2006