Characterization of Soil Particle Size Distribution with a Fractal Model in the Desertified Regions of Northern China - Guang-Lei Gao; Guo-Dong Ding; Yuan-Yuan Zhao; Bin Wu; Yu-Qing Zhang; Jian-Bin Guo; Shu-Gao Qin; Yan-Feng Bao; Ming-Han Yu; Yun-Dong Liu (Acta Geophysica, 2016)