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5Graham T. Allison, Essence of Derision: Exphining the Cuban Missile Crisis ( Boston : Little. Brown. 1971
6Morton H. Halperin. Bureaucratio Politics and Foreign Policy(Washington D.C. :the Brooking Institution, 1974 ).
8Park W. W., "A Review of Research on Groupthink, "Journal of Behavioral Decision Making, Vol 3,1990, pp. 229- 245.
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