Gjertz , Ian, Gunnar Henriksen, Torger Øritsland, and Øystein Wiig. “Observations of Walruses Along the Norwegian Coast 1967–1992”. Polar Research 12, no. 1 (January 6, 1993): 27-31. Accessed April 6, 2026. https://polarresearch.net/index.php/polar/article/view/1985.