Cover image for Top secret ultra / by Peter Calvocoressi.
Top secret ultra / by Peter Calvocoressi.
TITLE:
Top secret ultra / by Peter Calvocoressi.
By:
Calvocoressi, Peter
Publication Date:
1980
Publication Information:
London : Cassell Ltd.,
Physical Description:
132 p. : ill.
Subject Term:
World War, 1939-1945 -- Cryptography.

World War, 1939-1945 -- Secret service -- Great Britain.

World War, 1939-1945 -- Personal narratives, English.
Language:
English
ISBN:
9780304305469
NL Public Libraries Website
NLPL Facebook    NLPL Twitter https://twitter.com/NLPubLibraries    NLPL Twitter https://www.instagram.com/nlpublibraries/