On Hindu Kush . Retrieved 25 February 2008. ^ Nature & Mountains of Iran . Retrieved 25 February 2008. Archived November 22, 2007 at the Wayback Machine . ^ a b c Iran- Current Information . Retrieved 25 February 2008. ^ Payvand. "Iran: Focus on reverse migration" . http://www.payvand.com/news/03/nov/1135.html . Retrieved 2006-04-17