Fig. 8From: Chemical studies of Chinese coinage II: from Qin to Yuan (221 BCE–1368 CE)Plot of Pb/Cu vs Sn/Cu for Liao (907–1125 CE), Xi Xia (1032–1227 CE), Jin 1125–1234) and Yuan Dynasties (1271–1368 CE: data sources as in Table 1)Back to article page