Blake, D.B. and Zinsmeister, W.J. (1988). Eocene asteroids (Echinodermata) from Seymour Island, Antarctic Peninsula. Geological Society of America Memoir. 169: 489-498.
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Blake, D.B. and Zinsmeister, W.J.
1988
Eocene asteroids (Echinodermata) from Seymour Island, Antarctic Peninsula