TY - Acta Geographica Sinica A1 - HOU Guangliang,LIU Fenggui,LIU Cuihua,FANG Xiuqi T1 - Prehistorical Cultural Transition Forced by Environmental Change in Mid-Holocene in Gansu-Qinghai Region Y1 - 2009-01-25 00:00:00.0 JF - Acta Geographica Sinica JO - Acta Geographica Sinica SP - 53 EP - 58 VL - 64 IS - 1 UR - {https://www.geog.com.cn/EN/10.11821/xb200901006} N1 - 10.11821/xb200901006 ER -