Home › Authors › Yi Qian 👤 Yi Qian 3 books Books by Yi Qian 中囯 江河湖海 防污 減災 对策 中囯 江河湖海 防污 減災 对策 2002 Do additional national patent Do additional national patent laws stimulate domestic innovation in a global patenting environment? 2001 Fang yan jian shu (Xun gu xue Fang yan jian shu (Xun gu xue cong shu) 1991