 " The Cambodian Venture : An Assessment " . Time . 6 July 1970 . Retrieved 10 April 2007 . 
 " The Cambodian Venture : An Assessment " . Time . 6 July 1970 . Retrieved 10 April 2007 . 
 The Cambodian Venture : An Assessment  . Time . 6 July 1970 . Retrieved 10 April 2007 .