Adams, L. E. "The Collector's Manual of British Land and Freshwater Shells." London, 1884.
Aitken, W. G. Papier Mâché Manufacture. In Timmin's " Resources, Products and Industrial History of Birmingham." London, 1866.
Barbot, Charles. "Traité complet des Pierres
Précieuses." Paris, 1858.
Barrera, Madame De. "Gems and Jewels." London, i860.
Beck, Henry J. Le. An Account of the Pearl Fishery in the Gulph of Manâr in March and April, 1797. Asiatick Researches. Vol. V., 1798, P- 393·