• About.com - Forestry
• American Forestry Association
• American Society of Consulting Arborists
• American Tree Farm System
• Arboriculture Trees & Timber Homepage
• Association of Consulting Foresters
• Cornell University Cooperative Extension
• GreenNet - Arbor Age
• International Society of Arboriculture
• Nature Conservancy
• National Arbor Day Foundation
• National Arborist Association
• National Tree Trust
• North Carolina Division Of Forest Resources
• Ohio Department of Natural Resources
• PA Bureau of Forestry
• PA Dept of Agriculture
• Society of American Foresters
• Society of Municipal Arborists
• University of Georgia School of Forest Resources
• University of Minnesota Forestry Library
• University of Minnesota Urban Forestry Bibliography
• US Department of Agriculture
• USDA Forest Service
• Western Center for Urban Forest Research & Education Wilderness Society
• Yahoo Science: Agriculture: Forestry

Links Relating to Emerald Ash Borer

• Emerald Ash Borer Multi-State Website
• PA Dept of Agriculture, Bureau of Plant Industry - Emerald Ash Borer
• PA DCNR, Bureau of Forestry - Emerald Ash Borer
• Penn State Entomology Dept. - Emerald Ash Borer
• US Department of Agriculture, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine - Emerald Ash Borer
• US Department of Agriculture, Forest Service - Northern Area - Emerald Ash Borer

Links Relating to Oak Wilt Disease

• USDA Forest Service
• City of Austin Texas
• Minnesota DNR Newsletter 7-01
• Tree Care Industry
• University of Minnesota, Extension Service
• State of Wisconsin
• Texas Forest Service