World Meteorological Organization (WMO); International Union of Geodesy and Geophysics (IUGG); International Civil Aviation Organization (ICAO); Inaugural Meeting Scientific Advisory Group on Volcanic Ash (VA-SAG) (2-3 August 2010)
International Union of Geodesy and Geophysics (IUGG); United Nations Environment Programme (UNEP); United Nations Educational, Scientific and Cultural Organization (UNESCO)
International Union of Geodesy and Geophysics (IUGG); United Nations Environment Programme (UNEP); United Nations Educational, Scientific and Cultural Organization (UNESCO); World Meteorological Organization (WMO)
World Meteorological Organization (WMO); International Union of Geodesy and Geophysics (IUGG); WMO/IUGG International Symposium on Short- and Medium-range Numerical Weather Prediction (4-8 August 1986)
Hutchings, J.W.; World Meteorological Organization (WMO); International Union of Geodesy and Geophysics (IUGG); Symposium on Tropical Meteorology (5-13 November 1963)
