 " Indochina : The Rising Tide of War " . Time . 22 June 1970 . Retrieved 10 April 2007 . 
 " Indochina : The Rising Tide of War " . Time . 22 June 1970 . Retrieved 10 April 2007 . 
 Indochina : The Rising Tide of War  . Time . 22 June 1970 . Retrieved 10 April 2007 .