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History
- Published online January 1, 2009.
Copyright & Usage
© 2009, International Society of Arboriculture. All rights reserved.
Author Information
- Dennis Pittenger (corresponding author), University of California Cooperative Extension, Central Coast & South Region, Department of Botany & Plant Sciences, University of California, Riverside, 4114 Batchelor Hall, Riverside, CA 92521, U.S., Dennis.pittenger{at}ucr.edu
- Donald Hodel, University of California Cooperative Extension, Los Angeles County, P. O. Box 22255 Los Angeles, CA 90022