H. E.  Vokes, ?Cenozoic pearls from the Atlantic coastal plain?, Journal of the Washington Academy of Sciences, vol. 45, pp. 260-262, 1955.

D.  Nicol, ?A survey of inequivalve pelecypods?, Journal of the Washington Academy of Sciences, vol. 48, pp. 56-62, 1958.

D.  Nicol, ?A survey of inequivalve pelecypods?, Journal of the Washington Academy of Sciences, vol. 48, pp. 56-62, 1958.

H. E.  Vokes, ?Cenozoic pearls from the Atlantic coastal plain?, Journal of the Washington Academy of Sciences, vol. 45, pp. 260-262, 1955.