Argentina / Graciela I. Rodriguez-Ferrand --
Belgium / George E. Glos --
Bolivia / Graciela Rodriguez-Ferrand --
Canada / Stephen Clarke --
Denmark / Fariborz Nozari --
France / M. Tahar Ahmedouamar --
Great Britain / Kersi Shroff --
India / Krishan S. Nehra --
Japan / Takeo Nishioka --
People's Republic of China / Tao-tai Hsia --
Peru / Graciela I. Rodriguez-Ferrand --
Poland / Barbara Czachorsak --
Spain / Graciela I. Rodriguez-Ferrand --
Uruguay / Graciela I. Rodriguez-Ferrand.