Pope, Frank. Dragon sea : A historical mystery buried treasure an adventure beneath the waves / by Frank Pope. - 1st ed. - London : Penguin Books, 2008. - 341 p. : ; 20 cm. ISBN: 9780141029214 Subjects--Topical Terms: Shipwrecks--Hoi An.--VietnamTreasure troves--Hoi An.--VietnamUnderwater archaeology--Hoi An.--Vietnam