THE OLDEST EOLIAN LOESS DEPOSITION IN LONGXI BASIN-YANDONGGOU PROFILE IN LANZHOU
Zhu Jiunjie, Zhong Wei, Li Jijun, Cao Jixiu, Wan Jianmin, Wan Jianli
SCIENTIA GEOGRAPHICA SINICA . 1996, (4): 365 -369 .  DOI: 10.13249/j.cnki.sgs.1996.04.365