(Tokyo)International Congress on Motallic Corrosion (Mainz)International Congress on Metallic Corrosion International Congress on Motallic Corrosion International Congress on Metallic Corrosion (Toronto)International Congress on Electron Microscopy (Tokyo)International Congress on Combustion Engines (1972)International Congress on Catalysis (Wash.)International Congress of Refrigeration 9th international congress on cybernetics (Berkeley)International Congress on Mathematical Education