1. Acevedo W, Taylor JL, Hester DJ, Mladinich CS, Glavac S (2006) Rates, trends, causes, and consequences of urban land-use change in the United States. US Geological Survey, Professional paper 1726, USGS, Denver
2. American Forests (2010) National register of big trees. American Forests, Washington, DC
3. Birdsey RA, Heath LS (1995) Carbon changes in U.S. forests. In: Joyce LA (ed) Climate change and productivity of America’s forests, General Technical Report RM 271, USDA Forest Service, Rocky Mountain Research Station, Fort Collins
4. Cairns MC, Brown S, Helmer EH, Baumgardner GA (1997) Root biomass allocation in the world’s upland forests. Oecologia 11:1–11
5. Clark DE (1985) Sunset new western garden book. Lane Publishing Company, Menlo Park