References http://volcano.und.nodak.edu/vwdocs/current_volcs/current.html http://library.thinkquest.org/17457/volcanoes/index.php http://volcano.und.nodak.edu/vw.html http://volcano.und.nodak.edu/vwdocs/frequent_questions/grp8/question1657.html http://www.nsa.naples.navy.mil/disasterprep/whattodo.html http://www.disastersrus.org/emtools/volcano/volcano_emergency_plan.htm http://www.tallytown.com/redcross/library/VolcanicAshfallHowToBePrepared.pdf |