 " Danger and Opportunity in Indochina " . Time . 30 March 1970 . Retrieved 10 April 2007 . 
 " Danger and Opportunity in Indochina " . Time . 30 March 1970 . Retrieved 10 April 2007 . 
 Danger and Opportunity in Indochina  . Time . 30 March 1970 . Retrieved 10 April 2007 .