Notes
- Yardley , Herbert O. 1931 . The American Black Chamber Indianapolis
- H. and Sprout , M. 1943 . Toward a New Order of Sea Power: American Naval Policy and the World Scene 1918–1922 xii Princeton
- Angevine , Robert . 1992 . ‘Gentlemen Do read Each Other's Mail: American Intelligence in the Interwar Era’ . Intelligence and National Security , 7 ( 2 ) : 1 – 29 .
- Kahn , David . 1966 . The Code‐Breakers: The Story of Secret Writing 351 – 69 . 1037 – 42 . New York
- 1983 . Kahn on Codes New York
- Bamford , James . 1982 . The Puzzle Palace: Inside the National Security Agency 20 – 44 . Boston
- Yardley , to . 1985 . The Chinese Black Chamber New Tork
- Miller , Nathan . 1989 . Spying for America: The Hidden History of U.S. Intelligence 223 – 44 . New York
- Lewin , Ronald . 1982 . The American Magic: Codes and Ciphers and the Defeat of Japan 19 – 39 . New York
- Clark , Ronald . 1977 . The Man Who Broke Purple: The Life of the World's Greatest Cryptologist Colonel William Friedman 47 – 90 . London
- Farago , Ladislas . 1967 . The Broken Seal: The Story of ‘Operation Magic’ and the Pearl Harbor Disaster 11 – 75 . 390 – 4 . New York
- Andrew , C. M. and Dilks , D. , eds. 1984 . The Missing Dimension: Government and Intelligence Communities in the Twentieth Century London
- Cryptologia , 13 ( 4 ) 354
- 1920 . Foreign Relations of the United States , 1 : 101 – 68 . (1935),
- 1921 . FRUS , 1 : 31 – 79 .
- 1992 . Papers of Woodrow Wilson 416 423 504 Princeton
- Tribolet , L. B. 1936 . International Aspects of Electrical Communication 5 – 49 . 232 Baltimore
- 1920 . FRUS , 1 : 115 – 19 .
- Papers of Woodrow Wilson , 66 308 458 – 64 . 493 396
- Yardley . “ ‘Japanese Diplomatic Secrets’ ” . 823 – 962 .
- 1920 . FRUS , 1 : 139 – 62 .
- Documents on British Foreign Policy 1919–1939 , 1st series Vol.XIV , 297
- Evdin and North , eds. 1957 . Soviet Russia and the East, 1920–27 , 133 400 Stanford : Hoover Library .
- Griswold , A.W. 1938 . The Far Eastern Policy of the United States 306 New York