Chapter 110 references
〖1〗Silver Capital, written by (German) Frank, translated by Liu Beicheng, Central Compilation Press, 2008
〖2〗The source is the same as above
〖3〗The source is the same as above
〖4〗U. S. Geological Survey, Mineral oddity Summaries, January 2010·Silver
〖5〗Silver Iitute, Demand and Supply in 2009