Arbor Day Foundation at arborday.org

10 Reasons to Plant Trees— https://www.arborday.org/media/print/

Good Clean Water: Tree City USA— https://www.arborday.org/media/print/documents/2010-tree-city-usa.pdf

International Society of Aboriculture at treesaregood.org

Benefits of Trees— http://www.treesaregood.org/portals/0/docs/treecare/benefits_trees.pdf

Tree Values— http://www.treesaregood.org/portals/0/docs/treecare/TreeValues.pdf

Tree Selection— http://www.treesaregood.org/portals/0/docs/treecare/TreeSelection.pdf

Buying Quality Trees— http://www.treesaregood.org/portals/0/docs/treecare/buying_qualitytrees.pdf

Plant Health Care— http://www.treesaregood.org/portals/0/docs/treecare/PlantHealthCare.pdf

New Tree Planting— http://www.treesaregood.org/portals/0/docs/treecare/New_TreePlanting.pdf

Oregon Department of Forestry at oregon.gov/odf/Pages/index.aspx

Homeowners Guide to Tree Care— https://www.oregon.gov/ODF/Documents/ForestBenefits/HomeownersGuidetoTreeCare.pdf