Ëåâ Òðîöêèé.
1302.
Documents of the Fourth International: The Formative Years (1933–40). Ed. by Will Reisner. New York: Pathfinder Press Inc., 1973. P. 23–25.
Documents of the Fourth International: The Formative Years (1933–40). Ed. by Will Reisner. New York: Pathfinder Press Inc., 1973. P. 23–25.