Biblioteka
Instytutu
Józefa Piłsudskiego w Ameryce 
Biblioteka
imienia
Alfreda Jurzykowskiego Polskiego Instytutu Naukowego w
Ameryce
Biblioteka Marjanczyków Polskiej Fundacji Kulturalnej 
Welchman, Gordon.
The Hut Six story : breaking the Enigma codes / Gordon Welchman. - New York: McGraw-Hill, c1982. - ix, 326 p. : ill. ; 24 cm.
Includes index.
Bibliography: p. 315-317.
0070691800
81013657
Welchman, Gordon.
World War, 1939-1945--Cryptography.
World War, 1939-1945--Secret service--Great Britain.
World War, 1939-1945--Personal narratives, British.
World War, 1939-1945 -- Personal narratives, British.
D810.C88 / W44
940.54/86/41
The Hut Six story : breaking the Enigma codes / Gordon Welchman. - New York: McGraw-Hill, c1982. - ix, 326 p. : ill. ; 24 cm.
Includes index.
Bibliography: p. 315-317.
0070691800
81013657
Welchman, Gordon.
World War, 1939-1945--Cryptography.
World War, 1939-1945--Secret service--Great Britain.
World War, 1939-1945--Personal narratives, British.
World War, 1939-1945 -- Personal narratives, British.
D810.C88 / W44
940.54/86/41