Kunz, G. F. The Book of the Pearl The history, art, science, and industry of the queen of gems.
Citazione stile Chigago Style (17a edizione)Kunz, George Frederick. The Book of the Pearl The History, Art, Science, and Industry of the Queen of Gems.
Citatione MLA (9a ed.)Kunz, George Frederick. The Book of the Pearl The History, Art, Science, and Industry of the Queen of Gems.
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