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. UJQh8I3U7ACMT/CHYqcd73K9LP/91B4FpVuYz1+88V84Ab/Rcgzqy4axllz29ohg
