University of Arizona , College of Agriculture and Life Sciences Publications Includes Extension publications, video, and fact sheets including gardening, agriculture, 4-H and consumers. http://cals.arizona.edu/pubs/

eXtension.org is a dynamic, online resource that brings university information and education into your home or office. The practical, current, and unbiased information in this site represents the work of national Coopeative Extension system and professionals at more than 50 Land Grant universities throughout the United States. http://www.extension.org/

Extensión en Español is a national clearinghouse for Spanish-language educational resources operated by and for Extension professionals. http://extensionenespanol.net/

The Journal of Extension (JOE) is the official refereed journal of the U.S. Cooperative Extension System. http://joe.org/