http：//www.nsarchive.gwu.edu/coldwar/documents/episode-1/kennan.html；“The Charge in the Soviet Union（Kennan）to the Secretary of State”， FRUS ，Vol.6，1946，pp.696-709. 8c7SRiGdMBmWDVSQJhSBeX8+czjQoGUvMGuNE8k6DA5SFZO+vqqKBTU8LebcOSQ/
