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Winterbotham, Frederick William.

The Ultra secret F. W. Winterbotham. - 1st U.S. ed. - New York Harper & Row c1974. - xiii, 199 p. 22 cm.

ISBN: 0060146788 8.95

LCCN: 74007826 //r892

Subjects--Personal Names:
Winterbotham, Frederick William.

Subjects--Topical Terms:
World War--Cryptography.
World War--Personal narratives, British.
World War--Secret service--Great Britain.

LC Class. No.: D810.C88 / W56 1974

Dewey Class. No.: 940.54/86/41