W. A.  Herdman, ?Note on some points in the structure of the gill of the Ceylon pearl-oyster?, The Journal of the Linnean Society of London. Zoology, vol. 29, pp. 226-229, 1905.

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, ?Anatomy of the pearl oyster (Margaritifera vulgaris, Schum.)?, in Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar. Part 2, W. A.  Herdman, Ed. London: The Royal Society, 1904, pp. 37-69.

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, ?Anatomy of the pearl oyster (Margaritifera vulgaris, Schum.)?, in Report to the Government of Ceylon on the pearl oyster fisheries of the Gulf of Manaar. Part 2, W. A.  Herdman, Ed. London: The Royal Society, 1904, pp. 37-69.

W. A.  Herdman, ?Note on some points in the structure of the gill of the Ceylon pearl-oyster?, The Journal of the Linnean Society of London. Zoology, vol. 29, pp. 226-229, 1905.