Jewish Encyclopedia: Korah 
Overview of the Exodus rebel from the traditional Jewish perspective, including rabbinic commentary.
http://www.jewishencyclopedia.com/view.jsp?artid=362&letter=KKorah's Rebellion
Biblical biography of the rival of Moses.
http://www.execulink.com/~wblank/20000215.htm
The Sedition Of Corah
Chapter about the rebellion against Moses by the first-century Jewish historian Josephus.
http://www.interhack.net/projects/library/antiquities-jews/b4c2.html
