H. Ramos Matthews, ?Notas s?bre a família Pteriidae no nordeste Brasileiro (Mollusca: Pelecypoda)?, Notas Scientíficas, pp. 178-180, 1969.

I.  Kobayashi, ?Internal microstructure of the shell of bivalve molluscs?, American Zoologist, vol. 9, pp. 663-672, 1969.

G.  Bevelander and Nakahara, H., ?An electron microscope study of the formation of the nacreous layer in the shell of certain bivalve molluscs?, Calcified Tissue Research, vol. 3, pp. 84-92, 1969.

G.  Bevelander and Nakahara, H., ?An electron microscope study of the formation of the nacreous layer in the shell of certain bivalve molluscs?, Calcified Tissue Research, vol. 3, pp. 84-92, 1969.

I.  Kobayashi, ?Internal microstructure of the shell of bivalve molluscs?, American Zoologist, vol. 9, pp. 663-672, 1969.