- Ngawa Autonomous Prefecture (Aba Autonomous Prefecture)
| Xinhui Liu, Mingshen Feng, Jiajun Liu, Minwu Liu, and Yongwen Zhang (2011): Gold Science and Technology 19(4), 6-12 Jiajun Liu, Dan Yang, Jianming Liu, Zhenjiang Liu, Yan Yang, Guangjian Mao, and Minghua Zheng (2007): Earth Science Frontiers 14(5), 158-166 |