Elm Research Institute
- Nonprofit organization dedicated to the restoration of the American elm tree, Ulmus americana. Includes information about Dutch elm disease and the American Liberty elm, a group of cultivars with resistance to this fungal disease.
- http://www.landscapeelms.com

Ulmus americana - American Elm
- Detailed information from the U.S. Forest Service.
- http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/ulmus/americana.htm

Saving the American Elm
- Information about efforts to restore Ulmus americana to the landscape by developing and planting new disease resistant varieties. Includes photos and links.
- http://www.elmpost.org/

Ulmus americana
- Covers taxonomy, botanical characteristics, geographic range, uses and values, ecology including fire effects, and management concerns related to Dutch elm disease.
- http://www.fs.fed.us/database/feis/plants/tree/ulmame/