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84 The Americas

Turner, S. (2006) ‘Promoting UNESCO global geoparks ash’, www.volcanoes.usgs.gov/hazards/tephra/
for sustainable development in the Australian- ashandaircraft.php, accessed 25 May 2009
Pacific region’, Alcheringa, vol 31, pp351–365 United States National Park Service Public Use
USGS (United States Geological Survey) Volcano Statistics Office (n.d) www.nature.ps.gov/stats/
Hazards Program (2009a) ‘Volcanic gases and their viewReport.cfm, accessed 29 May 2009
effects’, www.volcanoes.usgs.gov/hazards/gas/ Waller, J. A. and Brink, S. (1987) ‘Trauma in tourist
index.php, accessed 6 January 2009 towns’ J. Rural Health, vol 3, pp35–46
USGS Volcano Hazards Program (2009b) ‘Danger to World Health Organization (2000) WHO air quality
aircraft from volcanic eruption clouds and volcanic guidelines for Europe, 2nd edn, WHO, Geneva

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