1. Sports Fishing Institute Bulletin, 203, 5 (1969).
2. Intern. Comm. NW Atlantic Fisheries, Comm. Doc. 71/14, Ser. No. 2561 (1971).
3. Tuck, L. M., The Murres (Department of Northern Affairs and National Resources, Ottawa, 1960).
4. Salomonsen, F., The Birds of Greenland (Munksgaard, Copenhagen, 1950).
5. Salomonsen, F., Fuglene På Grønland (Rhodes, Copenhagen, 1967).