California Exotic Pest Plant Council, www.igc,apc.org/ceppc/index.html.
California Native Plants Society, "Plant Invaders: A threat to California's Remnant Natural Areas (Description of the movie)", Xenobiota Control Ltd. www.calpoly.edu/~dchippin/cnps-mian.htm.
Colling, Barbara. Coastal and Chaparral Flowering Plants of Southern California, Kendall/Hunt Publishing Company, 1985.
County Parks and Recreation, staff. Otay River Valley Resources Report, 1994.
Dale, Nancy. Flowering Plants, Capra Press, 1985.
Editor of Sunset Book and Sunset
Magazine. Western Garden Book, Sunset
Publishing Corporation, 1995.
Farnsworth, Kahanah. A Taste of Nature, Christian Services Network, 1994.
Hector, Susan and others, Lectures to Docent Training class for OVRP, Summer/Fall, 1997
Klimbo, Flimko. "Blooming Flowers are Everything", San Diego Union Tribune, Wednesday, March 25, 1998.
La Rue, Steve, "Seeds of Destruction", San Diego Union Tribune. October 16, 1996.
Peterson, Victor. Native Trees of Southern California, University of California Press, Berkeley and Los Angeles University of California Press, 1985.
Wildflower Productions. Topo (CD), 1997,