Herdman (William Abbott)
The Pearl Fisheries of Ceylon. Abstract of a discourse delivered at the Royal Institution on March 27, 1903. “Popular Science Monthly,” Vol. lxiii, pp. 229–238, July, 1903.
Also in Smithsonian Report for 1904, pp. 485–493.
Presidential Address, 1905. Proceedings of the Linnean Society of London, 117th Session, pp. 20–30, October, 1905.
Report to the Government of Ceylon on the Pearl-Oyster Fisheries of the Gulf of Manar. 5 vols. London, The Royal Society, 1903–1906. 4to.
The Pearl Fisheries of Ceylon. Proceedings of the Royal Institution of Great Britain, Vol. xvii, pp. 279–287. London, March, 1905.
Hertz (Bram)
A Catalogue of the Collection of Pearls and Precious Stones formed by H. P. Hope, Esq. London, 1839. Fol.
Hesse (P.)
Die Perlfishcherei im Roten Meere. Zoologischer Garten, Vol. xxxix, pp. 382–385. Frankfurt-a.-M., December, 1898.