Barnes, L. G. (1977). "Outline of eastern North Pacific fossil cetacean assemblages". Systematic Zoology. 25 (4): 321–343. doi:10.2307/2412508. JSTOR2412508.
Barnes, L. G. (1977). "Outline of eastern North Pacific fossil cetacean assemblages". Systematic Zoology. 25 (4): 321–343. doi:10.2307/2412508. JSTOR2412508.