Yuan-era banknote (Picture: Neimenggu qianbi yanjiuhui 内蒙古钱币研究会 (Inner Mongolian Numismatic Research Institute) and “Zhongguo qianbi” bianjibu 《中国钱币》编辑部 (“China Numismatics” Editorial Department) (eds.), Cai Mingxin 蔡明信 (transl.), Zhongguo guchao tuji 中国古钞图辑 (A Compilation of Pictures of Chinese Ancient Paper Money)) Beijing: Zhongguo jinrong chubanshe, 1992, p. 57