Egg and clutch sizes in four passerine species in northern Finland
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Ojanen, M., Orell, M., & Väisänen, R. A. (1978). Egg and clutch sizes in four passerine species in northern Finland. Ornis Fennica, 55(2), 60–68. Hämtad från https://ornisfennica.journal.fi/article/view/132969