Title Top secret Ultra / Peter Calvocoressi

Published London : Cassell, 1980

Copies

Location	Call no.	Vol.	Availability
W'PONDS	940.548641 Cal		AVAILABLE

Description 132 pages, 16 unnumbered pages of plates : illustrations ; 23 cm Notes Includes index Bibliography Includes index Subject Calvocoressi, Peter. ULTRA (Intelligence system) World War, 1939-1945 -- Cryptography. World War, 1939-1945 -- Personal narratives, British. World War, 1939-1945 -- Secret service -- Great Britain. LC no. 81161556 ISBN 0304305464

Other Titles Ultra Ultra

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