EN中文
Spatio-temporal Evolution of Agricultural Eco-efficiency in Loess Plateau of East Gansu Province: A Case Study of Qingyang City
Zi-long ZHANG, Chen-yu LU, Xing-peng CHEN, Bing XUE
SCIENTIA GEOGRAPHICA SINICA . 2014, (4): 472 -478 .  DOI: 10.13249/j.cnki.sgs.2014.04.472