西北地区农业技术扩散环境的空间分异——以陕、甘、宁县域为例
于正松, 李同昇, 李献波, 孙东琪
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
地理科学进展
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2013, (4): 618
-626
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DOI: 10.11820/dlkxjz.2013.04.014
