J. D.  Stilwell and Zinsmeister, W. J., ?Molluscan systematics and biostratigraphy. Lower Tertiary La Meseta Formation, Seymour Island, Antarctic Peninsula?, Antarctic Research Series, vol. 44, 1992.

J. D.  Stilwell and Zinsmeister, W. J., ?Molluscan systematics and biostratigraphy. Lower Tertiary La Meseta Formation, Seymour Island, Antarctic Peninsula?, Antarctic Research Series, vol. 44, 1992.