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Cornell Cooperative Extension International Society of Arboriculture (ISA) Certification Training
Path to Becoming An Arborist — What, How, and Why?, by Snousha Glaude
Forester to Arborist - Main Street Magazine
Arborist - Wikipedia
Labor of love: How to become a tree-climber and why few want to – The Morning Call
What's Happening?: Great events and activities around the Bronx – Bronx Times
Thinking of Becoming An Arborist?
Vertical Gardening: Vines and Climbers - Continuing Education at the New York Botanical Garden
What is the best way to trim high tree branches? - Quora
Morris Arboretum class on tree-climbing for women
School of Professional Horticulture
Advice on how to be a good steward to the trees in your yard