Spatial expansion of cities at county-level or above in Gansu Province from 1992 to 2012 based on DMSP nighttime light images
LI Junfeng, PAN Jinghu
JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY . 2016, (3): 829 -835 .  DOI: 10.7522/j.issn.1000-0240.2016.0093

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