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Aerial and Ship-based Surveys of Steller Sea Lions (Eumetopias Jubatus) in Southeast Alaska, the Gulf of Alaska, and Aleutian Islands During June and July 1994
出版U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Alaska Fisheries Science Center, 1997
URLhttp://books.google.com.hk/books?id=L3UeAQAAIAAJ&hl=&source=gbs_api