4Barnes, Burton V. Forest Ecology. New York: John Wiley and Sons. Inc., 1998:575
5Gobster P H. Urban Savanna: reuniting ecological preference and function. Restoration and Management Notes, 1994,12 (1):64～71
6Kielbaso J J. Trends in Urban Forestry management. Baseline Data Report number 1. DC:ICMA, 1988:30
7McBride J R,Jacobs D F. Presettlement forest structure as a factor in urban forest development. Urban Ecology, 1986, 4 (9):245～266
8McPherson E Gregory. Structure and sustainability of Sacramento's Urban Forestry. Journal of Arboriculture, 1998, 24(2):174～189
9Miller, Robert W. Urban forest. New Jersey:Prentice-Hall Inc., 1988:387
10Nowak D J. Urban forest structure: The state of Chicago's urban forest. Northeastern Forest Experiment Station, General Technical Report NE-18.DC:USDA,1994a:3～18
