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"Etna." Global Volcanism Program. 23 Mar 2009 http://www.volcano.si.edu/world/volcano.cfm?vnum=0101-06=.

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"Mount Etna Italy." 25 Mar 2009 http://www.sveurop.org/gb/articles/articles/etna.htm.

Seach, John. "Mt. Etna." Volcano Live. 23 Mar 2009 http://volcanolive.com/etna.html.

"Sicily's Mount Etna erupts, no danger to residents." Thomson Reuters Sep 4, 2007 27 Mar 2009 http://www.reuters.com/article/environmentNews/idUSL0466082420070905.