Before revision: The Second International Polar Year (1932–1933) The International Meteorological Organization, the predecessor of the World Meteorological Organization (WMO), proposed and promoted the second IPY (1932–1933).
After revision: Soviet postage stamp commemmorating the 1932–33 Polar YearThe Second International Polar Year (1932–1933) The International Meteorological Organization, the predecessor of the World Meteorological Organization (WMO), proposed and promoted the second IPY (1932–1933).