Xia yi xiang dui lun zheng wei yan jiu. Guang yi xiang dui lun zhuan ti xuan jiang. Xiao wei qi ye fa zhan zheng ce yan jiu. Shang ye yin xing jing zheng li yan jiu. Qing dai zhuang zi kao zheng yan jiu. Ren min bi hui lv xing cheng ji zhi yan jiu. Qing dai< zhuang zi> kao zheng yan jiu. Ji yu wen hua jing zheng de zhan lüe yan jiu. 1927-1937 nian hu bei nong ye zheng ce yan jiu. Ying guo zheng dang yu zheng dang zhi du yan jiu.