The characteristics of gully erosion over rolling hilly black soil areas of Northeast China
HU Gang, WU Yongqiu, LIU Baoyuan, ZHANG Yongguang, YOU Zhimin,YU Zhangtao
Journal of Geographical Sciences . 2009, (3): 309 -320 .  DOI: 10.1007/s11442-009-0309-4