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3. Aerial and Ship-based Surveys of Steller Sea Lions (Eumetopias jubatus) conducted in Alaska in June-July 2013 through 2015, and an Update on the Status and Trend of the Western Distinct Population Segment in Alaska;Fritz,2016
4. Anthropogenic causes of the western Steller sea lion Eumetopias jubatus population decline and their threat to recovery;Atkinson;Mammal. Rev.,2008
5. Decline of the Steller Sea Lion in Alaskan Waters: Untangling Food Webs and Fishing Nets;National Research Council (NRC),2003