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Soot-Ryen, T. (1932). Pelecypoda: with a discussion of possible migrations of Arctic pelecypods in Tertiary times. In: The Norwegian north polar expedition with the "Maud" 1918 - 1925: scientific results, vol. 5 Biology(12). Bergen, A. S. John Griegs Boktrykkeri, 35 pp.
Soot-Ryen, T. (1932). Pelecypoda: with a discussion of possible migrations of Arctic pelecypods in Tertiary times. In: The Norwegian north polar expedition with the "Maud" 1918 - 1925: scientific results, vol. 5 Biology(12). Bergen, A. S. John Griegs Boktrykkeri, 35 pp.
