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Thomas, Rosamund M.

Espionage and secrecy : the Official Secrets Acts 1911-1989 of the United Kingdom / Rosamund M. Thomas. - London ; New York : Routledge, 1991. - [xv], 304p.

ISBN: 0415040671

Subjects--Topical Terms:
Espionage, British--History--20th century.
Official secrets--History.--Great Britain