A láthatatlan hadsereg
Subtitle: kémek, árulók, merénylők : hiteles történetek
By: írta Botár Árpád.
Publisher: Zrínyi Nyomda Kiadója
Published: 1990
Place of publication: Budapest
Language: hun
Number of pages: 251
Subjects: World War, 1914-1918 -- Secret service.; Spies -- Biography.