The Sonoran Desert National Monument was created in 2001 in Arizona, to enhance protection of the unique resources of the Sonoran Desert, with 2,008 square kilometers (496,000 acres). :Reference: Sonoran Desert National MonumentArchived 2009-01-26 at the Wayback Machine, Bureau of Land Management, U. S. Department of the Interior. Accessed on line June 17, 2009.
The Sonoran Desert National Monument was created in 2001 in Arizona, to enhance protection of the unique resources of the Sonoran Desert, with 2,008 square kilometers (496,000 acres). :Reference: Sonoran Desert National MonumentArchived 2009-01-26 at the Wayback Machine, Bureau of Land Management, U. S. Department of the Interior. Accessed on line June 17, 2009.
worldwildlife.org
"Sonoran desert". Terrestrial Ecoregions. World Wildlife Fund. Retrieved 2020-11-16.