W. A.  Herdman, ?Observations and experiments on the life-history and habits of the pearl oyster?, in Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar. Part I, W. A.  Herdman, Ed. London: The Royal Society, 1903, pp. 125-146.

W. A.  Herdman, ?Observations and experiments on the life-history and habits of the pearl oyster?, in Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar. Part I, W. A.  Herdman, Ed. London: The Royal Society, 1903, pp. 125-146.