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Fletta eftir höfundi "Afton, Alan D."

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Time budgets of Snow Geese Chen caerulescens and Ross's Geese Chen rossii in mixed flocks : implications of body size, ambient temperature and family associationsTime budgets of Snow Geese Chen caerulescens and Ross's Geese Chen rossii in mixed flocks : implications of body size, ambient temperature and family associations

Jón Einar Jónsson 1975 (2009)

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