V. Orr Maes, ?The littoral marine mollusks of Cocos-Keeling Islands (Indian Ocean)?, Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 119, pp. 93-217, 1967.

V. Orr Maes, ?The littoral marine mollusks of Cocos-Keeling Islands (Indian Ocean)?, Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 119, pp. 93-217, 1967.