*[http://www.cia.gov/csi/books/venona/preface.htm Venona: Soviet Espionage and the American Response, 1939-1957]
*[http://www.cia.gov/csi/books/venona/preface.htm Venona: Soviet Espionage and the American Response, 1939-1957]
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*[http://www.geocities.com/Pentagon/6315/comatph.html Communism at Pearl Harbor] How the Communist Helped to Bring om Pearl Harbor and Open UP ASIA TO COMMUNIZATION, By Anthony Kubek, University of Dallas.