9Armstrong, K E. Partnerships in urban forestry:Cities and nonprofit tree planting organizations in the North- eastern United States [ D]. East Lansing: Michigan State University, 2003. 被引量：1
10Silva F, Maria C. Protecting an urban forest reserve in the Amazon : A mnhi-scale analysis of edge effects, popu- lation pressure and institutions ( Habitat fragmentation) [ D ]. Indian polls : Indiana University, 1999. 被引量：1
