Zhong guo nong di zheng yong wen ti yan jiu/ Zhong guo nong di zheng yong wen ti yan jiu : Zhong guo du sheng zi nv wen ti yan jiu/ Zhong guo jing ji xiao yi wen ti yan jiu/ Zhong guo nong min gong de zhu fang wen ti yan jiu/ Zhong guo nong min gong de zhu fang wen ti yan jiu = Zhong gong dang shi zhong da zheng yi wen ti yan jiu/ Zhong guo jian cha quan zhuan xing wen ti yan jiu/ Zhong guo jing ji nei wai jun heng wen ti yan jiu/ Cai zheng zhi nong zi jin zheng he wen ti yan jiu/