000K  utf8
1500  fre
4000  Gaspard d'Yverdon, a spy. Letters to [the Russian Military Attaché in France,] A[leksandr] I[vanovich] Chernyshev dated 1810 and undated: military information; a trip to Switzerland; coded conversations about valuables
4000  Шпион Гаспар д'Ивердон. Письма к А.И. Чернышеву за 1810 и б/д. Военные сведения. О поездке в Швейцарию. Условные разговоры о ценностях
4060  6
4961  https://ditav.gbv.de/receive/lod_mods_00000640
5550  espionage on the military affairs
5550  intelligence activities