Attributes / relations provided by
♦ 1Winter food habits of Barrow's Goldeneyes in southeast Alaska, Philip S. Koehl, Thomas C. Rothe, and Dirk V. Derkson, Canadian Wildlife Service, 1984
♦ 2Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979