The adaptive significance of local variations in the bill and jaw anatomy of North European Red-necked Grebes Podiceps grisegena
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Fjeldså, J. (1982). The adaptive significance of local variations in the bill and jaw anatomy of North European Red-necked Grebes Podiceps grisegena. Ornis Fennica, 59(2–3), 84–98. Hämtad från https://ornisfennica.journal.fi/article/view/133097