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International Society of Arboriculture
http://www.isa-arbor.com
Western Chapter International Society of Arboriculture
http://www.wcisa.net
Aesthetic Pruning Association
http://www.aestheticprunersassociation.org
Power Point Presentations by Ed Gilman
http://hort.ufl.edu/woody/powerpoints.shtml
UC Integrated Pest Management
http://ipm.ucanr.edu/
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