Title: Undercover agents in the Russian revolutionary movement
Subjects: History, Informers, Internal security, Partīi͡a sot͡sīalistov-revoli͡ut͡sīonerov, Partīi︠a︡ sot︠s︡īalistov-revoli︠u︡t︠s︡īonerov, Politics and government, Revolutionaries, Subversive activities, Soviet union, history, revolution, 1917-1921, Intelligence service, russia (federation)
Places: Russia, Soviet Union
Time periods: 1894-1917