K.  Wada, ?Cultured pearl and its structure?, in Proceedings of the Symposium on Mollusca held at Cochin from January 12 to 16, 1968, vol. 3, 3 vol., Mandapam Camp: Marine Biological Association of India, 1968, pp. 972-974.

V.  K. Rao, ?Pearl oysters of the Indian region?, in Proceedings of the Symposium on Mollusca held at Cochin from January 12 to 16, 1968, vol. 3, 3 vol., Mandapam Camp: Marine Biological Association of India, 1968, pp. 1017-1028.

H. W.  Harry, ?An alternate view on the phylogeny of the Mollusca?, in Proceedings of the Symposium on Mollusca held at Cochin from January 12 to 16, 1968, vol. 1, 3 vol., Mandapam Camp: Marine Biological Association of India, 1968, pp. 170-187.

V.  K. Rao, ?Pearl oysters of the Indian region?, in Proceedings of the Symposium on Mollusca held at Cochin from January 12 to 16, 1968, vol. 3, 3 vol., Mandapam Camp: Marine Biological Association of India, 1968, pp. 1017-1028.

K.  Wada, ?Cultured pearl and its structure?, in Proceedings of the Symposium on Mollusca held at Cochin from January 12 to 16, 1968, vol. 3, 3 vol., Mandapam Camp: Marine Biological Association of India, 1968, pp. 972-974.