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Global Warming (album) Global Challenges Foundation GlobalGAP Global Defense Initiative GlobalTrade.net Globalbeauties Global Witness Global Operations Global Trade Item Number Global Association of International Sports FederationsTài liệu tham khảo
WikiPedia: Global Operations http://www.gamefaqs.com/pc/450386-global-operation... http://www.gamespot.com/global-operations/reviews/... http://www.thelostparadise.com/globalopsgame/