https://libcom.org/article/kontrrazvedka-story-makhnovist-intelligence-service-vyacheslav-azarov
Kontrrazvedka: The story of the Makhnovist intelligence service - Vyacheslav Azarov | libcom.org
Study of the Makhnovists' intelligence service during the Russian civil war, the Kontrrazvedka.
the story ofintelligence servicekontrrazvedkamakhnovist