The Ultra secret / F. W. Winterbotham. --

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Bibliographic Details
Main Author:	Winterbotham, F. W. (Frederick William), 1897-1990
Format:	Book
Language:	English
Published:	New York : Harper & Row, c1974.
Edition:	1st U. S. ed. --
Subjects:	Winterbotham, F. W. > (Frederick William), > 1897-1990 World War, 1939-1945 > Cryptography. World War, 1939-1945 > Secret service > Great Britain. World War, 1939-1945 > Personal narratives, British.

Description
Physical Description:	xiii, 199 p. ; 22 cm.
ISBN:	0060146788 :

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