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. zZZmNzumJyru4gyYNIU5QSofYdLTmp1LFOIKp6CJYC3hU5ziXPWCpjXnohosTzWS
