Yan Hu

• Hu li yan jiu / .
• Mei xue yu da xue sheng yi shu su yang
• (光緒)絳縣志
• Bai nian lai Zhongguo zhong xiao xue jiao shi zhuan ye hua jin cheng yan jiu
• Cai tuan fa ren zhi yan jiu
• Cao shu ji fa
• Chinese Oil Industry
• Chong zheng bian ;
• Guo zhai qi huo
• Ji mao fei shang tian
• Jiang Xian zhi
• Li shi gu shi jing xuan