Attributes / relations provided by
♦ ¹Food 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
♦ ²Historic and current habitat use by North Pacific right whales Eubalaena japonica in the Bering Sea and Gulf of Alaska, KIM E. W. SHELDEN, SUE E. MOORE, JANICE M. WAITE, PAUL R. WADE and DAVID J. RUGH, Mammal Rev. 2005, Volume 35, No. 2, 129–155