Geheim
Subtitle: Geheimhaltung und die Kunst, Geheimnisse aufzudecken
By: Wolfram Kowalewsky.
Publisher: Bund
Published: 1987
Place of publication: Köln
Language: ger
Number of pages: 187
Subjects: Official secrets -- History.; Confidential communications -- History.; Secrecy.
Notes: Includes bibliographical references.