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1by Alerstam, T., Gundmundsson, G.A., Jönsson, P.E., Karlsson, J., Lindström, Å.Get access
Published in ARCTIC (1990)
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3by Pennycuick, C. J., Griffin, L. R., Colhoun, Kendrew, Angwin, RichardGet access
Published in Journal of Ornithology (2010)
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