Anza-Borrego Desert in Borrego Springs, California - Colorado Desert Segment of the Sonoran Desert, Anza-Borrego Desert; State Park headquartered in Borrego Springs, California. - http://home.znet.com/kat/
The Sonoran Desert - DesertUSA - Description of desert, minerals and geology, culture and history, plants and wildlife provided. - http://www.desertusa.com/du_sonoran.html
Arizona-Sonora Desert Museum - A world-renowned zoo, natural history museum and botanical garden. Research and education programs and exhibits on the Sonoran desert region. - http://www.desertmuseum.org/