东北地区粮食单产空间格局变化及其动因分析

程叶青

Spatial pattern change and its driving factors of grain per unit area yield in Northeast China

CHENG Ye-qing

自然资源学报 . 2009, (9): 1541 -1549 . DOI: 10.11849/zrzyxb.2009.09.004