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Volcanic Ash Briefings & Presentations
Volcanic Ash Procedures – Southern Hemisphere
http://www.bom.gov.au/info/vaac/cordon_caulle.shtml
http://www.caa.govt.nz/publicinfo/med_rel_Ash_Cloud.htm
Dated: June 2011
Volcanic Ash – To Fly or Not to Fly
The Institute of Mechanical Engineers Report
Dated: October 2010