Evaluation of Regional Ecological Secur ity Based on Dynamic Factor s ———A Case Study of Wanquan County, Hebei Province
ZHU Yunhai,ZHANG Baiping,CAO Yinxuan,ZHANG Yunsheng
PROGRESS IN GEOGRAPHY . 2006, (4): 34 -40 .  DOI: 10.11820/dlkxjz.2006.04.004