THE EXPERIENCES AND PROBLEMS OF COMPREHENSIVE AGRICULTURAL PRODUCTION SYSTEMS IN YOUYU COUNTY, SHANXI PROVINCE FROM THE VIEW POINT OF ECOLOGICAL DEVELOPMENT
WANG Xian-Pu, SUN Shi-Zhou. THE EXPERIENCES AND PROBLEMS OF COMPREHENSIVE AGRICULTURAL PRODUCTION SYSTEMS IN YOUYU COUNTY, SHANXI PROVINCE FROM THE VIEW POINT OF ECOLOGICAL DEVELOPMENT[J]. Journal of Ecology and Rural Environment, 1989, 5(2): 50-53.