'The Wonderful Wizard of Oz' Website
A comprehensive guide to the world of Oz, including information on all the books in the Oz series as well as resources for teachers that span multiple educational disciplines.
The Wizard of Oz: An American Fairy Tale
http://www.loc.gov/exhibits/oz/
An online Oz exhibition compiled by the Library of Congress, which includes historic and contemporary memorabilia related to the book and the 1939 film.
7 Theories of What The Wizard of Oz Is Really About
http://www.vulture.com/2013/03/wizard-of-oz-theories-gold-standard-feminist-religion-jung.html
A 2013 article by pop culture site Vulture that explores...