Technical Resources-Basic Tree Care
How to Prune Trees - USDA
Pruning Young Trees- ISA
Pruning Mature Trees - ISA
Tree Pruning Essentials - Spanish
Tree Owners Manual - USDA/IDNR
Tree Topping
Don't Top Trees - ADF
Don't Top - Tree Topping: What It Is Why its bad and How to Prevent It.
Why Tree Topping Hurts - ISA