EN中文
Spatial differences of agri-technique diffusion environment in Northwestern China: A case study of counties in Shaanxi-Gansu-Ningxia region
YU Zhengsong, LI Tongsheng, LI Xianbo, SUN Dongqi
PROGRESS IN GEOGRAPHY . 2013, (4): 618 -626 .  DOI: 10.11820/dlkxjz.2013.04.014