4Wang Geng 1,2 , Nie Baochi 3, Wang Lin 1 & Wu Wei 1 1. School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China ,2. Urban and Environmental School, Liaoning Normal University, Dalian 116029, China,3. Shenyang Buraue of Water Resources, Shenyang 110013, China..Research on Methods of Ecological Security Assessment of the Middle and Lower Reaches of Liaohe River Based on GIS[J].Chinese Journal of Population,Resources and Environment,2005,3(4):20-25. 被引量：12
