Fig. 13From: Copper alloy production in the Warring States period (475-221 BCE) of the Shu state: a metallurgical study on copper alloy objects of the Baishoulu cemetery in Chengdu, China(Data sources: see Fig. 12)Comparison of the lead isotope ratios (207Pb/204Pb versus 206Pb/204Pb) between Baishoulu and other states.Back to article page