Columbia subject headings:
Harvard subject headings:
Bletchley Park (Milton Keynes, England)--History--20th century.
Enigma cipher system
Rejewski, Marian, 1905-1980
World War, 1939-1945--Cryptography
World War, 1939-1945--Military intelligence--Great Britain
Princeton subject headings:
Bletchley Park (Milton Keynes, England)--History--20th century.
Enigma cipher system.
Rejewski, Marian, 1905-1980.
World War, 1939-1945--Cryptography.
World War, 1939-1945--Military intelligence--Great Britain.