Ericson, P. G. P. (1987). Osteology of the eider, Somateria mollissima (L.): A study of sexual, geographic, and temporal morphometric variation in the eider skeleton. Statens Historiska Museum.
Chicago-стиль цитированияEricson, Per G. P. Osteology of the Eider, Somateria Mollissima (L.): A Study of Sexual, Geographic, and Temporal Morphometric Variation in the Eider Skeleton. Stockholm: Statens Historiska Museum, 1987.
MLA-цитированиеEricson, Per G. P. Osteology of the Eider, Somateria Mollissima (L.): A Study of Sexual, Geographic, and Temporal Morphometric Variation in the Eider Skeleton. Statens Historiska Museum, 1987.
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