Foreign Investments Barriers-Mexico, Canada, OPEC countries, China, Soviet Union August 1989 - World Trade and Arbitration Materials View Foreign Investments Barriers-Mexico, Canada, OPEC countries, China, Soviet Union August 1989 by - World Trade and Arbitration Materials Foreign Investments Barriers-Mexico, Canada, OPEC countries, China, Soviet Union August 1989 1 6 World Trade and Arbitration Materials