V polusenkite na istorii︠a︡ta
Subtitle: komunikat︠s︡ii, shpionazh i otrovitelstvo prez vekovete
By: Lili︠a︡na Simeonova
Publisher: Iztok-zapad
Published: 2022
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 415
ISBN-13: 9786190109617
Notes: In Bulgarian; Cyrillic alphabet.